Why am I being this way?

I am back with my ex and we get along fine.We were separated and lived our own lives for several years.During this time I was involved with another guy.I loved the other guy but we split up.After a while my ex and I got back together but I am having a problem.I feel insecure.I didn't feel insecure before with the other guy but now I do and I can't understand why....i'm usually a very independent person.Self sufficient but I find myself wanting attention,making comments,overly affectionate to my guy.It's getting me to a point where I am irritating myself.Can somebody help?tell me why I might be feeling this way or why I am doing this?

I know exactly how you feel. You said that you loved the guy you were with when you were separated. The problem is, that it didn't work with him and it didn't work with the guy you're with now the first time. You probably have yourself convinced it won't work again and that you will lose love again. Be confident in yourself. The person you are with now obviously cares about you or he would not have come back. They say when you love something let it go, if it comes back to you it's yours forever. Well, this person came back to you.