Drew-
You should give more information. If you're confident enought to post for advice here, I'm sure a lil' more info. wouldn't hurt
Have you had/do you have a girlfriend now?
Have you/do you/did you 'fool around'?
If 'Yes', and 'Yes' - Did you still have no 'urge' or any lack of interest.
It could very well be your girlfriend killing your thought's of 'nookie', or you may need to get a girlfriend to better your chances of wanting to 'hit it'
In any case, I don't think anything is wrong with you. Keeping in mind you're a student and a rabid EQ player, I can see where thinking of 'tang' just isn't fitting in your lifestyle.
Ragardless, if it isn't hurting anything - keep doing what you are now. You seem to have a good future ahead of you with or without a sex drive. If it really is upsetting you, talk to your physician or something.
It could be a medical problem, but at your age, I really wouldn't think you have low testosterone , some sexual dysfunction/disorder, horomone imbalance etc.
For the record, most women don't buy the virgin-line, it's pretty old now.
My friend used the gay line (he was hot) - worked every time, he'd taunt women until they would throw themselves at him trying to 'turn him straight', which he was already..lol
Anyways, if you're happy, don't stress yourself over it.