How to move on, on a broken friendship?

[Respect]

Well Iam 16 yrs old guy. I have a bestfriend (well used to). I know I made some mistakes in the past but when I tried to talk to her, She just walked-out then when I ask why? she doesn't speak at all.The following day I discovered that she has a "something" with this other guy which Iam way better than at every way even when it comes to a way thinking. I just gave her a SPACE for a month and this is what i discovered. and we've known each other for 4 yrs!. and the next thing happen they make conversation in twitter instead doing it privately, I never knew that she could be Inmature. I like her of course because she is so mature and when she speaks it all make sense but now She is really changed. I really dislike her now but of course she is still my friend I want to do things that is for the best and hoping we could find time to talk to each other and clear things up before we go to college and meet new people and bring back our friendship. One of my problem is that she is always with this Guy. Iam not jealous or something Iam happy for them but I cannot just avoid her all the time. So what do you think I should do?

[Babyface]

Well, there's nothing much you can do. If your friend doesn't wants to be close to you, you can't get close to her. I don't know what mistakes you did or what misunderstandings happened between you two but if you know there's a reason why she is being that way, try to talk to her about it and take responsibilty for it. However if she is unwilling to speak then you can't expect her to reply to you. If you have her e-mail address or her phone number, send her a message to her to apologize. Or just tell her directly. It's up to her to forgive you or not. You just do your part of apologizing to her and leave the rest to her.

People can change as time pass by. So it's not so surprising that your friend changed. It's part of human nature to change. It's not necessary that we'll be same in the future.

If she is still not talking to you and is still avoiding you, forget about it. You can stay in contact with her but I don't think you can be close to her again. So forget about being her best friend again.
Maybe you'll get a new best friend if you look for it. Make some new friends or hang out a little more with your current friends for a while.
There are some friends who leave their old friends when they get a bf/gf or new friends. Maybe your friend is like that?
Anyway if she is not interested, you shouldn't be interested as well.

Take care.