In Infatuation with the wrong person

What do you do when your heart leaps every time you look at him? When you take a breathe and every waking thought is about him? You can't tell him, there is too big of an age gap, not to mention he is your proffessor, so you just go to class every day and day dream.
I don't even know how to explain my feelings. I have never been in love(I do not think I am in love now) I don't really believe in relationships and yet there is a quality to this man that is charming yet untouchable. Most of the girls in my class ( and yes the majority are girls) think he is just most handsome person ever. I agree...I wish that I could relate my feelings in a more articulate manner, but I am not able to.
I don't know what to do when someone that you fall for is completely wrong wrong wrong! Not to mention you are not able to tell anyone because they just would not understand. Its different with the boys my age, they are cute; however there is a mind set about this man that blows me away. He loves the earth, animals, he doesn't eat meat, he inspired me to be a better writer and yet, there is not any hope.
I could not ever tell him how I feel that would be entirely innapropriate. He is currently fifteen years my senior and a working on his PHD. Perhaps the worst part of it is, is that he has this effect on a lot of the other girls who sit around and fawn over him and it is not just designated for me.
I make him laugh, but he is easy to amuse. Not to mention I tended to irritate him this semester with my constant tardiness and lack of ever having my papers printed out because I broke mine and didn't have time to fix it and my luck was that the entire University's printing system went down. Thats not to say I didn't have a reason for my constant lack of being prepared. Currently my job has me working sixty five hours a week as well as having to do two summer classes. I have not had a day off since July 13 until today. He told me that I make all my choices, however, I wasn't supposed to work this much(it is under the table so technically I do not work. As well as I got a job just to pay my cell bill, etc but then a whole bunch of people quit and not enough people tends to lead to working a lot. It is getting better now though, I have been promoted to one day off a week until school starts, and then I do not work), and with a whole bunch of drama happening with my sister, my friend's dad dying, and work....I didn't have much of a chance to breathe.
However, I couldn't explain this because it sounds as though I am whining(which I am). Usually I don't fall for people and yet I fell head over heals for this man. I don't know what to do about it because I feel as though I am just going in circles. Anyway, the printer incident happened on the last day of class and he was supposed to go to a bbq with a bunch of the students but I made him angry so he didn't come. Of course I feel bad and its as if that was my last chance. I probably won't really ever see him again because that English class was the last one I had to take and now I Iam doing solely math and physics courses. It is just really sad that the one person you want, you can't have...actually its more embarrassing.
Its just life.