>I have told my parents, flat out, that I believe I'll kill myself if I go through another semester at college.

There's your answer right there.

Take a year off. Work. Travel. Do something that doesn't make you want to kill yourself. If your parents don't understand that, well fuck 'em.

You'll make friends while you work. You'll make friends while you travel.

Your school will certainly take you back when you're ready. You already got yourself through the door once. Just leave on good terms and they'll welcome you back with open arms.

I think you're being too cynical about campus health services. A lot of those people really do care and they just may not have the resources to do everything that they would want to do.

College is important, but definitely not as important as your mental health. If you feel like you need to take a semester off and de-stress, schools generally offer leaves of absence. Being with your family could be very helpful.

You could also think about cutting back on the number of classes, to avoid stress. When I was in college, I went to a lot of clubs and meetings for various things, and it helped reduce my isolation. I didn't end up really liking most of those clubs or activities, but there were a few that really helped. If you try a few, you might find one like that!