can't stop staring

ok so there's this guy at work and i know it sounds weird but every time he walks by my desk or even just looks up from his computer i go all jelly legged. like honestly can you blame me? he has the best smile, like seriously makes my heart flutter, and his laugh is better than any coffee on a monday morning. i mean i've never actually said anything to him beyond small talk and he's probably wondering what’s wrong with me. anyone else ever have this kind of thing happen? is it normal or am i just losing my mind?