...My Secret Crush...

I'm married with kids, but I've had this crush on one of my college professors since before we even graduated. It's just a feeling that she knows me in ways others don't and it's thrilling. We're both adults, so it's not like anything has happened, but there's something about the way she looks at me from across the room... I feel like there's potential for more than a teacher-student relationship, but I know better. It stays hidden and private. Have any of you ever had a crush on someone who could never be anything more? What did you do with those feelings?