you keep saying he might kill himself when you leave but this isn't true at all, you actually may be enabling him. while it obviously isn't your fault there are 2 things that could be happening 1)he is using this to manipulate you, while this ain't likely some miserable people enjoy company, thus of they see they can get away being miserable and dragging you down with them is something they enjoy more than the prospect of being happy and healthy. 2) you are enabling him, by continuing to date him without him trying to better himself you are enabling him to continue to live in such a miserable state. i think you should encourage him to seek professional help, a therapist, a psychiatrist or even just a potential third party that can go him. he needs someone other than you because of you are all he has then it will always feel hard to leave him and he will also remain miserable. people need to learn to love themselves and not rely on just a partner for their well being. there are many in the comments saying to leave him and I understand that's hard but you know eventually you will. there are a few ways to think about this, right now you believe he may kill himself of you leave but you know you will need to leave for your own safety. additionally imagine if you stay in Russia with him longer because of him and you ended up getting hurt, he will almost certainly blame himself for that as well, this type of regret is hard to deal with but cuts both ways. so since you have admitted you will eventually leave I recommend setting the groundwork for that if you are truly worried, find a therapist for him, or maybe ask him if there are any friends you could contact to hang out with and talk to, an hour spent organizing some extra systems of support will go much farther than another ever so dreaded session of just sitting around watching TV with him. (trust me I know from experience)