What are the reasons a man would go back to an ex-wife he chose to divorce and even after supposedly falling in love with another girl?

My ex and I haven’t been together for almost two years now, but recently I broke up with my current boyfriend. Out of nowhere, my ex and I began to sext every now and then. We plan to meet up and fool around, but I think I’ve fallen back in love with him. How do I make him see he love and look past he lust? I now I sound stupid, but I honestly just miss him loving me like I was the best thing in his life.

What size back shock will fit on a 2007 diamond back coil ex bike?