Will I be single forever?

I'm 5'8, 15 in october. I have a sculpted face and deep light brown eyes. I had one proper girlfriend who I'm trying to get over but it is 2 years almost 3 I think and I think I'm letting opportunities pass because of my nostalgia. But I want someone better. I though my ex was the best one but we had to separate because of ethical issues. The question is. Will I be single forever? Or a very very very long time. My ex is over me, in fact falling for my best mate. I want to be over her to. But I don't feel that I will meet anyone who will trump my ex... HELP ME!!!