When I saw my professor, he acted a little cool. I didn't know whether it was because there were so many people around or he was just embarrassed. But when he avoided me after class, I started thinking I had done something wrong. Maybe I shouldn't have given him that quick kiss on the mouth. That maybe he regretted kissing me.
So one evening, I waited for him in the parking lot. When he got to his car, I walked up and asked him if I had done something wrong. He said I hadn't but he had. He apologized and told me had a girlfriend in another town that he was eventually going to marry. He said he was sorry and didn't want to hurt me. He hoped he could still be my advisor and friend.
As much as it hurt, I knew I'd rather have him as a friend than not have him at all. So we went on just being good friends.