I no it wasnt love, but could it of been?

I feel the same way. My ex of 3 years cheated on me. We broke up last year. But I still go on his facebook page. I started dating 3 months after we broke up to help me heal faster and he just now getting a girlfriend. When I look at their photos I kinda wish it was me, but i dont know why because I know i dont want to date him again and I kno im not in love with him. I guess what me and u are feeling is the "what ifs"