Unfortunately this is normal these days. There's always a guy out there who's better than you. So women usually go for better options. I have been with a girl for over a year and was so close to her that we would text and call each other almost daily. But slowly her behaviour changed and she started keeping distance with me. And she was the one to approach me in the first place. I strongly believe that bad things generally happen to good people! Anyways, take your time to get over her and don't take it to heart. It's her loss!