I'm glad you asked. Any big life change like going to college is more difficult for a person with BPD, I think. It certainly was for me, and in retrospect, I wish I'd known the following:
If I were you, I would try to establish a routine as quickly as possible, and stick to it. Try not to overstimulate yourself, or get over-involved with people too quickly. I know we can make friends really fast, but that can tip over into over-involvement that wrecks our ability to focus and stay calm. Think: Quietly, quietly. I know the temptation is to surround yourself with all these wonderful new people, but don't overindulge.
Remember to look after the basics: Food, finances, exercise, cleaning. Make sure your meals are looked after, you're not overspending, that you're getting regular exercise, and that you're looking after your room/laundry/self.
Another good thing is to find a creative outlet, like painting, or writing, or singing/music. Exercise can be a real lifeline; I like running, and other people I know enjoy weight-lifting, swimming, or similar.
Don't get overconfident. You might find yourself feeling great around week three...maybe just a little nervous, for some reason...Just remember not to take for granted your need for structure, continuity and routine. These things are absolutely essential to you. Turn all the pressure of the BPD symptoms into creativity and functionality. Yes, we have an illness, but it's not something that has to necessarily get ahead of us. When you look at it, we are just more driven than ordinary people to have a good life, to be organized, to be creative, to look after our health, get exercise and stay focused. We have incentive -- the incentive of not wanting to suffer!
If possible, it would be very helpful if you maintained some kind of therapeutic relationship where you could phone your therapist or someone similar to discuss things. This can be very helpful for someone with BPD; just having someone to touch base with, someone who gets you out of the immediacy of the situation so you can get some perspective on your new life. (Actually, this forum might be helpful for you over the next while. We'll certainly look forward to hearing from you).
Take care. I hope everything goes well for you.