It'll be like three years before you quit comparing everyone, at least mentally, to her. The doubts that she's put in you will sadly pop up even longer, but that's not the point. The point is that someone has told you they don't want you, and wishing it wasn't so isn't going to make it any different. You can't be her friend, you can't "just talk." All you can do is gather up the tattered scraps of your dignity, let her do what she will without interference, ignore any requests for help on her part or any desires to discuss her new relationship and for crying out loud just focus on yourself for a while. Five years from now you'll be glad you didn't call, didn't beg, and just got up and left with some pride. Don't worry. Everything passes, and leaves you wiser and stronger. Life isn't for pussies.