It sounds like a lot of complication between both of you. You guys aren't in college anymore, she's old enough to know what she wants/doesn't want, and how to make amends if she really wants to. You can't just come into a persons life after all these years and pretend like nothing happened. And the truth is if she did it before, then who is to say she won't do it again? You should really think about this before making any other moves to rekindle friendship.