I (21f) have a crush on my professor (46m)

I’m taking a class in university and I’ve developed an obsessive (borderline concerning) crush on my professor. I feel like a teenager again, I get nervous when he looks at me and I find myself fantasizing about him at all hours of the day. I know that nothing can or will every happen, nor would I ever try anything with him because I know how ridiculous it is (and how it could seriously affect both of us if I were to ever do anything). It’s gotten to the point where I daydream about him and it’s completely consuming me. I often imagine that we bump into each other outside of campus and go out, even though he seems completely professional and not the type to ever cross a line. I’ve never been like this over anyone, I’m not usually one to get intense crushes but I can’t help it right now. I feel like I’m going mad and have lost any ounce of sanity.