i need some advice....?

It is never to late to let her know how you feel. And yes she was probably very hurt that you assumed the worse. Best friends should stick by one another no matter the situation. IS she your one person. The person you would call if you did the most unimaginable thing. Are you hers? I bet theres was a time that she doubted you and apologized to you about the whole mess. Maybe she misses you and loves you. I bet she has been upset as well, but try to look at it from her point of view. She should look at it from your point of view as well. One thing to always remember is that BEST FRIENDS share everything.

I am also betting that the assumption may not be true if your having doubts. Look at the facts, Not the situation. Then shoot her an email or call her for lunch. Love goes a long way in a friendship.

Well you should try and talk with your friend and explain to her that you made a mistake in judgement that you chose the other person's side at first becasue you thought she was in the wrong, but now you realize that you were wrong. you may be surprised your firend may be waiting on that apology from you. I am sure that it hurt for you to chose the other person and if SHE was a true froend, she will be willing to forgive you

You need to learn how to communicate more. If you are the friend that you say you are and if she means as much to you as you say she does then you should believe her when she tells you something. I was in this particular problem once. But me and my friend worked it out and i kno you two will also.

No one is perfect, people make mistakes. I'm sure if you showed her how sorry you were and told her what you have told us that she will forgive you. Admit to your mistakes and beg her forgivenesss. At least you realized you were wrong and she will see that and forgive.

Tell her what you told us. The truth. Then it's totally up to her. you risk losing the friendship, but hopefully you learned a lesson too.

The answerer above has made some good points. Shoot her over an email.

You have to do something people don't like doing ... apologize and ask her to forgive you. Then the ball will be in her court to either accept or reject the apology - and you'll have to accept her decision. To leave it unsaid will eat at you.

tell her..........that you know you made the wrong decision by choosing sides you should of stayed out of it.tell her what you told us

She needs to read this. Maybe she'll see how sorry you are, but that doesn't mean that she will forgive you.

tell her the truth and let her take it from there

u did your part now its her turn

gud luck