I understand how you feel. I'm also a college student, doing great on first three semester, now a problematic final year student. I could easily admit my condition here, on the internet, but have no luck in real life. I also do the same thing like you, shutting down myself, cutting off contacts with everyone, telling my roommate to not giving me any messages, things like that. I have several friends from high school that still keeps in contact with me and just a couple from college. I've made a comment here about a 'friend' who always said to 'laugh it off' everytime I face something. I tested everybody, dropping hints about me feeling down and wanting to talk. Like I said, no luck. I desperately wanted to share my problems with them, at least get this thing off my mind. The responses I got was just laugh it off, stupid motivational cheering, silence (meaning they just there, silent, not listening or paying any attention at all), and the worst kind of response: pulling everything back to them that was completely irrelevant story while PLAYING WITH THEIR PHONE. Most of the time I didn't get the chance to tell the core problem. Sad, isn't it? It made me think, are they really my friend? I've been trying my best to give them support when needed, why can't they just sit there and listen properly? What I'm trying to say is, don't expect much from your friend. Sure, they might listen, but brace yourself for their response. Not that they're judging you, but response like I said before, which could make yourself feels even worse. I hope you get more luck than me. I wish you have a friend that could listen properly to your problem.