Thats normal but You have to let go of the past, not only for yourself but for the new guy, how would you feel if this guy told you he still loved his ex?
The connection was stronger, what happens is we become so comfortable in a previous relationship (kind of like a drug) that we are afraid to try something new. We are afraid of this relationship hitting ship side and then its like what do you have after?
I met a guy who could match me but I caved in and went back to my ex only to have the same problems as before but now the other guy won't talk to me, A real love triangle!!!!!
Anyways the other guy is upset he really liked me and well I wouldnt go out with him cause I really wanted to try on my marriage but it was a recipe for disaster. If you can be comfortable with yourself or do what you really want to do it really helps but first you have to learn how to love yourself first.