I hope you also post on the excellent music forum here. There are many intersections between music (composing) and computer science these days. If you can continue on the path you are on, you may find some interesting paths to follow. Check out Brown’s MEME program (oops they call it something else now I think), Dartmouth’s Digital Arts MA, and UCSD’s integrative studies just for some examples.
There are many ways to keep music in your life of course, but I think it’s great you are trying to hold onto it as long as you can. The thing is, for a non-conservatory student, you are in an unusually good position with Eastman’s openness to you. If you did transfer, you might want to stay away from schools that have conservatories/music schools. There are exceptions (look at Bard maybe) but oftentimes doing music in a BA program at a school that offers a BM can mean fewer opportunities to study with teachers or have performances.
Have you considered a double degree as opposed to double major? With that, you could do a BA or BS and BM ( or at Harvard, MM at NEC). Bard, Oberlin, Lawrence, Michigan, Tufts, Harvard, Johns Hopkins/Peabody and others are often mentioned. For double major, schools like Brown or Amherst have free choice of classes w/out prerequisites. State schools are a possibility too.
One problem with all this though is that both music and computer science are sequential majors with foundational courses. Another school might have a different sequence and the courses might be a little different so you might not end up with the same foundation as others. You can check this out on websites and with schools. Many students, for instance, prefer to start theory sequences at the beginning at their school, even if they did wonderfully on the placement exam, because each school is different in the way they teach it. Ditto with physics: some who get 5’s on AP still want to take the intro at their specific school.
Is there anything at all you can do to make Rochester appeal more?
You seem intelligent and articulate. Chances are you will not be happy at a school where peers are not as intelligent or articulate. I can’t say that for sure of course, but it is a possibility. Schools with talented peers may seem stressful, but there are ways to handle that by changing your own attitude. Maybe try not to focus so much on grades. I know there are practical reasons to focus on them, but still, try to just learn the stuff and do your best and forget about the rest. And have some fun too.
You may not like this, but since you keep mentioning weather, is it possible that you suffer a little seasonal affective disorder? You can buy a light for that 
If there is any chance at all that you have a little seasonal depression, a low dose SSRI can help too. People may jump on me for that, but one of mine got depressed in the winter and it took us too many years to address it with very low dose of a med. Her entire life turned around.
Clearly, it makes the most sense to stay there. Really. If that is really difficult to contemplate, I do suggest counseling, a light, or consideration that you might be a little depressed. This happens to about 50% of all college students. The best thing a realization like that can accomplish is that you might stick with it and not head down a tangent in your life that you regret.
Thinking long term is hard when you are unhappy. Good luck!
p.s. One final thing: not sure what your financial aid situation is but you generally get better aid at the school you enrolled in as a freshman.