What should I do, If I dont take revenge from her for ruining my life??

You don't forget what she did, but move on. By getting revenge, you are only giving yourself a few moments of satisfaction- and aren't you looking for a lifetime of a better life for YOU? The best kind of revenge would be to move on with your life and be happier than you were before. Get some private counseling or therapy. I don't really see how you can move on without some outside help. It is like starting over- but people do it all the time. It IS possible.