Converting a mountain bike to a urban commuter
Feelings are definitely very important, but a dual suspension bike with a two-crown fork is a difficult start for a commuter bike. Especially if your budget is limited.

I would think that you should inflate the tires well and take a ride to school to see what it's like in its current condition. If you can block suspension, that might help.  I guess if you love or hate your first ride, it'd be a part of an answer to your question.

If it's neither a bliss nor a hell of a ride, you could ask a more specific question, e.g., for advice on particular problems you experience. A possible way out is to sell certain components (such as the fork) and buy new ones that would fit your purpose better.

But yeah, after all, it's a beautiful machine, personally I'd try hard to keep it. Good luck!