i do see quality ones else where but there isnt one that cleans my desk, does my homework and spends hours teaching me stuff when i dont understand or pay attention in class like organic chemistry, and the roomate is becoming more a problem i feel. if i were to take her out to dinner should i mention it as a date?

It's a tough call since your understanding of the situation and emotional attachment are different than mine. So all I can offer is an opinion:
I believe that in a girls mind the idea of a "date" is a romantic, candle-lit dinner with kissing, cuddling and the whole nine yards (like in soap operas). If she view you as a friend, a "date" would sound awkward. Even if she agrees there may be tension. What you need is a change to run your game. Make it sound as a "fun night out" along the lines of "i guarantee we'll have a good time". This is commitment vs no-strings-attached - easier to agree to.

As it comes to your roommate, its best to find out where he stands. If you are close to him, ask him what's going on with this girl. It's better to get the bad news than do all the footwork for nothing. It may even turn out he is not interested and its all in your head. You will feel better regardless.
Hope this helps
Al