I'm usually cynical, but I have this crazy feeling?

I've known this guy for a month, we had an amazing time together, then I moved away. But I just really want to see him again, and keep having weird little soppy thoughts about him, which isn't usual for me, I'm normally cynical and level headed, but I feel my insides going all gooey thinking abou him. Argh! What's happening to me? What shall I do?