I struggled with this a lot when I lived on my own during my second year of college. My friends had both moved on to other people, grew apart from me, then we had a falling out when we tried to hang out finally. I was extremely depressed, stayed in my house all the time, stopped going to class altogether, would call in to work once a week, and let my house pile up with trash and dishes. It was truly awful.

The only advice I have for you is do not let your schoolwork suffer! Don't let it get away from you. Find a quiet place where you can de-stress and do work. It's so difficult trying to get back into school after you let your grades go for a semester or two. It will be much more worth your while to work on yourself, find things to do to keep you from getting depressed and unmotivated, and if your friends don't make time for you, find new friends or spend time with your family.. or find something you can do that makes you feel good about yourself (i.e. paint, write, work out, do yoga, run, swim, join a book club.. I dunno, haha).

That's all I've got for now but it's what I wish someone would've told me back when I was letting school slip out from between my fingers and down the drain. I've wasted a lot of time since then and although I wish I hadn't, I'm going back to the grind this fall hopefully and am determined not to let it happen a second time.

Best of luck,
K