Hello lonel: Welcome to PsychCentral! PC is a great place to gain support as well as to obtain mental health related information. There are many knowledgeable & caring members here. The more you post, & reply to other members' posts, the more you'll gain from the time you spend here.

I'm sorry you are struggling. I don't know as I have any particularly great ideas for you. I would think that it might be worthwhile to start seeing a therapist again & possibly consider getting back onto some antidepressants, if you are not taking them now. Beyond that, perhaps you might see if there is a club or other types of organization you could join. Perhaps do some volunteer work, if you can find the time or even get a part-time job... anything that will bring you into contact with people. Doing something to help others is a proven way to combat depression. A support group of some sort might also be beneficial if there is something like that you could join.

From what you wrote, it sounds like you pretty-much know what is at the root of your depression. So what you need to do is to figure out some way of surrounding yourself with other people. I know that, at this point, it may be a challenge to make this happen. But it is what you need to do. If you need help to accomplish this, perhaps there is someone you're involved with in your exchange program who could assist you. If this all feels like just too much for you at this point, then this is perhaps where antidepressant medication comes in. I wish you well...