Ok, i know that this is not a good way to find a solution, but I don't know what to do and I need advices...
The thing is that I had my first boyfriend (I'm bi) and I thought that I found a person that really likes me. Another thing is that I had some personal problems with myself because some problems that I had in the past and I told him some of them to him.
Like 20 minutes ago he broke with me because he thinks that I'm hurting myself with being with him and I tried to fix everything and he doesnt answer my messages and I don't want to loose him because I really love him and... I don't know what to do

And that's relevant to the story how?

Patience is the key.

Although it's hard. And don't show that you are somehow dependent on him.

With this I think you're one of the few members with a mature mind.

need more info to judge and comment.
What did you say to him exactly.

Let it out

First rule in life, if someone can't value your worth then kick them to the CURB.

It's easier said than done but after you had your heart broken so many times... you just become numb and learn to let people go. You can't make someone love you unfortunately, and you'd only be hurting yourself forcing him to stay with you.

If he can't/won't be there for you in your time of need, then you'll find someone else.

Mess

The thing is that I had an accident when I was a child and I feel a little unconfortable with myself. And he thinks that I'm hurting myself with being with him because last week I told him that he can find someone better than me.

Just tell him that your bisexuality was a phase and now you want to find yourself a husband./

If you don't have anything good to say, don't say it. Move on from the accident, let the past behind just like the charts did with Gaga.
You thought he was gonna feel sorry for you, but it went the other way. It's your fault for playing the victim, again just like Gaga.

P.S. It's screwed, move on and learn from the past for your next relationship (Do something Gaga can't)

You're uncomfortable about who you are so you're blaming it on him?

You're being selfish.

OK so good of a opportunity to drag GaGa!