Why do I still think of him?!

Long story short. I met a guy and fell for him two months after meeting and then he left for the military. A lot happened within those two months and it's been six months since he's been gone. We talk here and there and when he came back for a few days, I saw him and we agreed to see other people. But he told me that I still excite him and stuff and I teased him saying that he still likes me and he told me that the feeling is always going to be there and maybe in time we will be a couple. I'm trying to date other people but all I can think about is him. Ugh I miss him and I still love him 😭.