Crushing on my professor

Absolutely!  After you graduate.  .........and just remember you may be one in a row of professor groupies who has a crush on this fascinating man who may well like all the "crush" feedback he gets.

ABSOLUTELY NOT!!! If you have a crush on him, so do probably hundreds of other students. Unless you plan to start up some type of relationship with him, and I wouldn't advise it, it would only make him feel very uncomfortable, everytime he is in your presence. Spare him that embarrassment, and yourself if he doesn't reciprocate the feeling. And you KNOW whether he does or not.

And if you do FEEL you have to tell him, do it only AFTER you have graduated. Do not make it an uncomfortable situation for everyone involved, because of YOUR feelings.

Hi,
No.  Absolutely not.  If you do it you can do much harm.  Here is a short list:
1.  You might embarrass him.
2.  You ruin the formal relations.
3.  You won't let him be "fair" to you any longer.
4.  He might ask you to leave his class (for good).
5.  You might be "special treatment" (  + or - ) and that is not fair.
The best thing to do is wait until you graduate or untill he is no more your Professor.  
Best regards,

Thumbs up to the previous answers.

No, you are supposed to be learning the class(not the professor). He is at work to teach, not date. There are other ways to meet women and he probably already has one anyway. Don't put him (or yourself) in an embarrassing situation like that! Blessings, ~ nmpb ~