Is it normal to want to be with two guys?

I have been with this guy for a couple months after leaving my ex. My ex and I had problems in our relationship with trust, sometimes sex, and we both had personal issues w/ lifebut. I won't go into that though. Well I can never stop thinking about the ex. The new bf seems to be drifting away and I'm not attracted or interrested in him but I can't leave him alone.I want to talk to the ex sooo badly because ill always love that man. I know he knows it too and would love to be with me but I'm not sure if I want to jump back and forth between men like that... Any words of wisdom??