Why is this happening to me?

I am totally into this new guy at work. granted I have yet to talk to him. He doesn't work in my department so we rarely interact. When we do pass each other in the hall I get light headed and speechless.

It's the craziest thing since I haven't had this happen since high school. Plus I mean he is obviously good looking, but not like some Channing Tatum hot. I don;t know how to get over this so I can at least say hi. Quite honestly it's embarrassing as once I had to almost sit down I thought I was gonna pass out:(
Why is this happening to me?
Post Opinion