He's my Ex-Boyfriend who I moved away from.

So, my ex boyfriend is in town and I've realized two things. A. why I no longer felt anything for my previous ex. B. I still am completely in love with him. It's way to soon to start dating again, especially since my ex won't let go still but I can't help my feelings for this boy. Man, I'm in a whirl wind of mess. Just saying. He's nineteen and I'm sixteen yet just the other day when we were texting back and forth he told me he still loved me. This was after I had realized choice b. This is horrible. I have two chasing after me. I only want one, which is the one I still love obviously. How much more confusing can it get? I suppose it could be I still love both of them and don't want to let go but that's not the case here. I just want one. But I can't have him because then the other one would be like, you were cheating on me the whole time. And it's only been three weeks. My ex and I just started talking the other day. What to do?