The Professor's Secret Admirer

Hey everyone, I know this might sound crazy, but I've developed a bit of a crush on one of my professors. We have some similar interests in our field, and he's always so passionate when teaching. It feels silly because we're like five years apart in age at least. I haven't told anyone about it though, I don't want to make things awkward or seem disrespectful. Is this normal for a grad student, or am I overthinking this too much? What should I do?