I want to encourage you to NOT get discouraged when people talk about the "freshman 15". My daughter has always been quite overweight (and pretty seditary) and when she left for college last fall she was at about 315. Let me tell you that she was able to eat so much better at school than she did at home (as far as salads and fresh fruit) and she was walking all over campus. When she came home for the summer she had actually LOST 15 lbs!

Her attitude about being on the move has changed from being away at school also and she is down to 292! Slow moving... yes, but her whole attitude about her body has changed and this weight is coming off without her having to torment herself. And her brother had also lost weight his Freshman year the year before- it CAN be done!
I told you all that to say this.... Do NOT allow the naysayers to get into your head- you do NOT have to gain weight just because you are away at school. I truly believe that the ones who are more likely to gain that freshman 15 are the ones who were highly active in sports and then didn't have that outlet when they got to college.
I wish you lots of luck and success!
-Jodi