Bobber,
I will give you some serious advice.
As you already know, all you have to do is monitor your diet. You mentioned that you like sushi. . .stick with this. For breakfast stick with:
4 eggs
2 slice of toast or
1 cup of oatmeal
1 banana
1 cup orange juice
1 multi-mineral vitamin
For a snack eat a myoplex bar.
Lunch can be sushi.
Dinner can be chicken, potatoes, and a salad.
Find foods that cooperate with you. You can still gain muscle on a lower calorie diet.
Eat a variety of foods and find stuff you like
As for the beer. . . .be careful. It is OK to have a beer every now and then, but don't let it become a habit. You do not want to travel the road to alcoholism. Also, beer is loaded with calories.
drink a lot of water.
As for training, get back into the gym at least 3 to 4 days per week at 1 hour training sessions.
Stay away from psycho women!!! They will mess with your head and sidetrack you from your dedicated training and eating habits.
Really a 32 inch waist is not that bad! With hard work and good eating habits, achieving a 29 inch waist is certainly in the realm of possibility. I wish you luck!
And most of all. . . . hit the books!!! Get those grades up!! This should be a good semester for you.