Am I considered to be napaak if I find wetness in the region of my private parts and I know that it was not urine and that I did not get an erection.

I am at College and come into contact with a non muslim female in my class (she is the only female in the class). The class is small and to avoid her is difficult. I am not married and do not have any female friends. Even though I try, but I cannot help but think about her. Sometimes in class when I am near her or talk to her I find that there has been some sort of fluid release from my penis even though I did not get an erection (I also don't think it was a urine release). I would like to know if this makes me napaak or am I still paak? Can I perform Salaah in this state? Can I just wash my private part to become paak so that I can perform Salaah otherwise I have to miss my Namaaz? Do I need Ghusal or do I have to remove the piece of clothing that is wet or is it ok if the wetness dries and will I then be considered paak? Please advise me.