Is this weird?

My ex boyfriend of on and off since 2003 is like best friends with one of the guys I broke up with him for back in like 2004. I think this is super weird. I still really like my ex because he was the best boyfriend ever. And when I go back to Arizona to visit I always end up spending half of my time there with him. Now the other guy still calls me and tells me that he misses me and that he wants to be with me and he is sorry for messing what we had up back then. I tell him to give it up all the time but he doesnt care obviously! So i think this is too weird.