how can i get my love back into my life?

This post is so vague, we wouldn't know where to begin.

Consider that people generally have a good reason when they break up with someone. Try to figure out what that reason was on your end. Maybe write her a letter. You know, with paper and stamps and all of that. And apologize for whatever it is you did.

Accept, too, that she might not come back. That happens, too.

'she doesnt beileive me anymore."

Bet there's more to this than what you write.

Trust has to be earned. Apparently she's done with you.