That happened to me after I moved back from Calgary last summer. I lost a whole bunch of friends in Alberta and came back to nothing, had to move back in with my parents, realized I hated the field I was in, was on the verge of turning 25 and I felt like a failure and so lost and lonely. I kind of went crazy and went to the hospital for a couple of weeks last September. I'm doing a lot better now but I'm still not all there yet. Things will get better for you, it just takes some time. Do you go to counselling? I find that talking to professionals help. Take all of the help that is offered to you, that's what I say especially when it comes to your health.