Re: I'm a girl-how do i win his trust back?!
Well, if he didn't find out from you, then you had no intentions of telling him in my opinion.
Personally, I wouldn't be able to give a second chance after this, especially after only two months. You see, I have been lied to and cheat on in the past and made to feel it was my fault. I believe in complete openness and honesty in relationships and I cannot handle being lied to at all and will not tolerate it because it won't take much to loose my trust and I refuse to go through that kind of stress again.
It sounds to me like he has the same kind of thing going on. Now...you need to give him time as mentioned above, and if he does take you back, you need to realize he will probably punish you for your mistake pretty badly, because even if you didn't cheat it is even worse because now you have to pay for something you didn't do and he will always wonder.
Let him ride it out, but if I were you I would figure on being the one to contact him, rather then wait for him to make the move. Men are proud, but people make mistakes. I'm glad you learned from yours, it shows some real character.
KISS - Keep it Stupid Simple