Even more, I prefer to be alone doing some hobby rather than going to a party full of people I know.

In the past, I have felt very guilty for this.

However, somthe problem I'm dealing with now is making eye contact.

That's what I'm on focusing now.

Eye cContact

Even more, I prefer to be alone doing somea hobby than going to a party full of people I know.

I would combine this sentence with the previous to sound more natural:
"I tend to avoid social events and I prefer to be alone doing a hobby than going to a party full of people I know."

I just wanted to be around other people so that I doidn't feel weird.

However, somthe problem I'm dealing with now is eye contact.

Even when talking, it can be very difficult for me to look at the speaker.

Also, I realizeknow that I have a very serious face sometimes, and I think that makes people uncomfortable when beingthey're with me.

That's why I try to not make that judgingserious face and just relax.

That's what I'm focusing on now.

And not only that, I want to be myself without being afraid of how people look at me or if theypeople rejected me.

The bad part is that when I walk into a room I somehow can read people's minds and I start to overthink about how I have to act in front of them, an. That's a habit that I'm trying to stop once and for all.

In the past, I feltused to feel very guilty forabout this.

I was very shy and I felt very alone, because I didn't have any friends.

I just wanted to be around other people so I wouldon't feel weird.

However, somthe problem I'm dealing with now is eye contact.

Even when talking it can very difficult for me to look at the speakmy conversation partner.

That's why I try to not make thata judgingmental face and just relax.

That's what I'm focusing on now.

And not only that, I want to be myself without being afraid of how people look at me or if thewhether they may rejected me.

The bad part is that when I walk into a room I somehow can read people minds and I start to overthink about how I have to act in front of them, an habit that I'm trying to stop once and for all.

Eye cContact

We typically capitalize both words in a title.

Even more, I prefer to be alone doing some hobby thanover going to a party full of people I know.

or: I would rather be… than

In the past, I felt very guilty for / about this.

“About” sounds more natural to me, but I’m not sure “for” is wrong.

That's why I started to hang out with some people, but / even though they weren't really my friends.

Something about “but” in this sentence doesn’t feel right to me.

I just wanted to be around other people so I wouldon't feel weird.

However, somea problem I'm dealing with now is eye contact.

Also, I realize that I have a very serious face sometimes and I think that makes people uncomfortable [when being with me | around me].

There’s nothing wrong with your original wording, I’m just offering an idiomatic alternative.

That's what I'm focusing on now.

And not only that, I want to be myself without being afraid of how people look at me or if they rejected me.

The bad part is that when I walk into a room I somehow can read people minds and I start to overthink (about) how I have to act in front of them, an habit that I'm trying to stop once and for all.

I would omit “about.”