I knew I should go to study, things such as English, drums etc.

But what I wanted to do was to read a novel online because I didn't want to think about anything, and I haven't been to the top floor for a few days.

Today was cool, I thought I should go upstairs to enjoy theis comfortable moment.

There was a plot that a bBoy A had a relationship online, h. He just talked to his boyfriend on telephone, and they had neverot seen each other for six months before they broke up.

His roommate asked him why he didn't have a raelationship with somebody who lives nearby, so that they could hang out a lot.

In contrast, reading a novel was unvalued, which was a wasting foe of time.

Emotionally, I wanted to take a break from work for a wholde day work.

you had the idea!

The two thoughts were fighcontradicting.

Furthermore, I began to think "where do I really want to be?"

Who do I really want to be?

WIs what I think I should do is really what I want to do?

When I was on my way of taking the rubbish out, I remember the sentence from the entry which was about the satisfaction of running.

does rubbish here mean garbage? could be another dialect of english. its still correct .

I knew I should go to study, such as English, drums etchave gone to study English, practice the drums, or something like that.

You usually don't study musical instruments–you practice them.

But what I wanted to do was to read a novel online because I didn't want to think about anything, and I haven't been to the top floor forin a few days.

Keep the verb tenses consistent–last sentence was in the past tense, so this one should be, too.

Today was cool, so I thought I should go upstairs to enjoy the comfortable moment.

Or you could split this into two sentences (period after "cool")–you just need a conjunction between two independent clauses if you want to have them in one sentence.

I picked a bl novel randomly.

Not sure what bl means?

There was a plot that plot followed a boy, A, who had a relationship online, h. He just talked to his boyfriend on telehe phone, t. They had never seen each other for six months before they broke up.

His roommate asked him why he didn't have a raelationship with somebody who lived nearby, so that they could hang out a lot.

A answered, "I just felt lonely and wanted to have a connection with someone."

Suddenly, I found outrealized that it is the same reason why I wanted to read a novel instead of learning something.

This thread has a good explanation of the difference between "find out" and "realize"
https://forum.wordreference.com/threads/difference-between-realize-and-find-out.1571433/

Intellectually, I know that I should' have learned something that I think is more valuable, such as English, which can help me with my IELTS.

In contrast, reading a novel was unvalued, whichn't valuable/it was a wasting foe of time.

I think "unvalued" is a word, but I've never really seen it used.
Oddly enough, "invaluable" actually means "extremely valuable." English is weird.

Emotionally, I wanted to take a break from aafter spending the wholde day working.

This version sounds more natural to me.

As a result, I couldn't concerntrate fully on the novel totally because I felt guilty.

I

I could hardly enjoy myself.

Furthermore, I began to think about where I really wanted to be?.

Who did I really want to be?

Again, verb tense consistency–everything should be in the past tense.

Was what I thinkought I should do is really what I wanted to do?

When I was on my way tof takinge the rubbish out, I remembered the sentence from the entry which was about the satisfaction running.

Yep, life can be also easier and simpler when I just take it step by step.

So, I siat down and write downstarted writing about my struggle to improve my English.

I knew I should go to study,'ve went to go study something such as English, drums, etc.

But what I want to do was to read a novel online because I didn't want to think anything, and I haven't been to the top floor for a few days.

A better way to write this would be:
"But all I wanted to do was read a novel online because that didn't require me to think about anything. I haven't been to the top floor of my house for more than several days."

I picked a bl novel randomly.

I'm not sure what "bl" means here. Maybe this was a typo or spelling mistake? Feel free to let me know what it means and I can edit my correction.

There was a plot that a boy A had a relationship online, he just talked to his boyfiend on telephone, they had never seen each other for six months before they broke up.

A better way to write this would be:
"The plot of the book was about a boy (boy A) who had an online relationship. While he has talked with his boyfriend on the phone, they had never seen each other in the six months from when they got together until they broke up."

(I'm not sure I understood the meaning correctly. Feel free to let me know if I'm mistaken.)

His roommate asked him why he didn't have a raelationship with somebody who lives nearby, so that they could hang out a lot.

A answered,"I just felt lonely and wanted to have a connection with someone."

Suddenly, I found out that ithis is the same reason why I wanted to read a novel instead of learning something.

Intellectually, I should've learned something I think is more valuable such as English, which can help me with my IELTS.

A better way to write this:
I should've spent the time to learn/study/review something valuable such as English, which can help me with my IELTS.

In contrast, reading a novel was unvalued, which was wasting fonot valuable and a waste of time.

Emotionally, I wanted to take a break fromafter a wholde day's work.

These two thoughts were fightingconstantly in conflict with each other.

As a result, I couldn't fully concerntrate on the novel totally because I felt guilty.

Furthermore, I began to think about where I really wanted to be?.

You can connect these sentences like this:
Furthermore, I began to think where I really wanted to be and who I really wanted to be.

What I think I should do is really what I want to do?

"Am I doing things because I should do them or because I want to do them?"

Thus, I stopped reading.

"Two hours later, I started feeling bored so I stopped reading"

When I was on my way tof takinge the trash/rubbish out, I remembered the sentence from the entry which was about the satisfaction running.

"Running was so easy thatbecause I just needed to run step by step.

Yep, life can be also easier and simpler when I just take it step by step.

You can also write it as: "Yep, life can be much easier and simpler when I take it step by step."

So, I siat down and wriote down my struggles in order to improve my English.

And then I need to gowent to bed early and getsince I also needed to wake up early.