What's wrong with me?

There is this guy and I cannot get him out of my mind. I don't know why. He went to my high school, which wasn't that long ago. And from the moment first saw him I really just couldn't get him out of my mind. Despite being extremely shy I started talking to him and found out we have the most odd and outrageous things in common i.e we both love clic movies and film in genral, Doctor Who, clic rock (pink floyd led zeppelin...) we're Odd Future fans love food have similar mannerisms find the same things funny we can both be very over the top when around people we're comfortable with but usually we're very shy and observant. We've been talking for a while and hanging out and still after all these months whenever I think of him I get this weird feeling in my stomach. And when I see him it's like my heart drops and I don't know why and sometimes it's hard to sleep because he's always plaguing me. And this frustrates me because at times he can be the most challenging person and he always has something smart to say and at times it comes off as annoying. However for some reason with all this, I almost always laugh when I'm around him, especially at the way he's always so nervous and jumpy and the way he rambles and touches his person a lot. An he laughs for no reason. And he smiles at me whenever I see him or widens his eyes or raises his eyebrows and when he would talk to me in person he would always be fiddling with something. He would always tease me about how clumsy I am and remembers random information that i tell him regarding myself. And we make kooky faces at each other and for the most part usually come to the same agreements. Although there are times when we argue and debate about futile subjects. I don't know why I feel this way. Whenever I think of him I get this weird shudder/electric feeling especially when I see him and when we talk. I have no idea why this happens. This has never happened to me before and right now I'm a little worried at this point. I'm hanging out with him again soon (we've been planning to go on a fast food adventure for a while >.< I'm so excited!!! =P) But still I don't know what's wrong with me, or him but especially me. I think I need some help.