A bit of background - me and ex both 22 and were together for almost 8 years until we split up 3 months ago. The break up was due to me feeling as though the relationship had run it's course and that we had just outgrown it from being together at such a young age.
He took it very badly and we still talk now and again. Although I had made it clear that it was over he insisted that he would not move on and that he would wait a few months incase I changed my mind, I told him not to do this but he was adamant.
In the last 2 weeks I have been missing him and questioning if I made a mistake by ending it, I know I will never find someone who loves me the way that he does. I know that he's still 'waiting' for me and that he would get back with me in a heartbeat. But the problem is, around 2 months after breaking up I slept with someone else
I know that he would be absolutely heartbroken and devastated if I told him I can't imagine his reaction, I don't think he would get back together if he knew.
Although I was completely single I feel so guilty. My question is, if we were to get back together at some point should I tell him that I slept with somebody else?