If you find that you are a trophy for a professor you are dating, you should question whether you really want to be with someone who cares about you because you are a boost to their ego.
Some relationships between professors and students fizzle when you leave the classroom environment.
Love is a hard thing to find and sometimes it begins in less than ideal situations.
This is the direct result of a former instructor writing an embarrassing article about his affair with a student.
By dating a student, the professor is vulnerable to charges of harassment.
This may not be the case, but that might be what it looks like. Students that date professors can come under suspicion of sexual harassment as well.
Do me a favor: learn to get out of this awful, narrow-minded bubble you're in and accept the fact that two people can be attracted to each other with no ulterior motive, even in a classroom environment.
Through discussion with colleagues I have learned that a female professor in my department has been actively seeking out sexual liasons with male students since her arrival in our department in 2004.