I know how you feel. My ex one day just decided she fell out of love with me. It crushed me, and I could do nothing but try to find answers, try to find a reason. No matter how far I dug I could never find an answer, and I never will. I do still think about her from time to time, but in the begining all I could think about was the good times. I never thought of the bad things, the things we disagreed on, the way her father treated me, the general feeling of "You're not wanted" I recieved from her entire family. Once I took a step back and looked at the relationship as a whole, not just the sweet and happy memories, it became easier to let go. I will not lie and say I'm 100% over her, and I don't really think I ever will be, but I think that's normal. I think for the rest of your life you will remember this girl fondly, but if you refuse to let her go, you will never have that feeling of love again. Just wanted you to know you're not alone in this.