Hi Meowmix.
I COMPLETELY understand how you feel. I think about this a LOT. I am 28 and was diagnosed when I was 18, and I'll answer your college question first.
I lived in a dorm for the first year of college, but found it just too difficult. I was flaring and just didn't feel comfortable being so sick around my roommates (4 of us shared a bathroom). I was lucky that I went to school only 20 minutes from home, so I moved home for the rest of school and spent my housing money to buy a car to commute. I was much happier, healthier, and really enjoyed college. I did take 5 years instead of 4, but I double majored and worked as well. It really is up to you and what makes you feel most comfortable.
As for the dating issue, I don't really have many words of comfort, except that I feel like I'm in the same boat as you are. I have never dated much, and honestly I could have written what you said about "feeling bad" about dating someone. I feel like I have to rope them in and then drop the bomb, because if they knew from the get-go what they were getting into, no one would ever give me a chance. I don't want to sentence someone to the life that I live. I hate having to depend on other people and I hate holding people back. At the same time, I am so lonely and it is so hard to be sick without a support system. Some days it is just so hard to accomplish normal tasks and how nice it would be just to have someone to cuddle with me or make me a meal becuase I don't feel well enough. At the same time, there are SO MANY times where I don't feel well enough to even function, and I'd hate to have to tell my boyfriend that I didn't feel well enough to go out/travel/talk/stay up/have sex/run errands/etc. I just hate disappointing people. I have tried hard to tell myself that I can be happy and can manage the rest of my life by myself, but it's a tricky thing. I don't want to be lonely forever. But I feel like this disease makes me a flawed person--I feel like the person I'd be with would deserve better.
You can message me if you want...I truly understand where you're coming from.