It's a girl in my life that I love too much. I have told her my feelings but she doesn't agree. Anyway we talk a lot every day but she is totally in love with someone else.

Any advice how to win her heart ?

Back off and forget her before you wind up getting even further involved... you will only wind up getting hurt. If she claims to be totally in love with someone else, there isn't much you can do and the outcome could prove to be more painful than just forgetting about her.

Respect, and accept her not wanting romance with you and leave her alone. It won't win her heart, but you keep your own dignity, and self respect.

Well , I don't want to back up because we talk a lot together and have a good time... also she found out a bad thing about the other guy... I'm optimistic ;) I think I will make her love me... I just need advices :>

We gave you the best advice you're going to get... beyond that, you're on your own.

OK guys , thanks for reply :)