Torn between family and boyfriend

It's such a long story but it really feels like a burden, I don't know what to do. I'm a 23 year old guy from Austria and currently studying in Sweden. I met my first and current boyfriend 2008 through an online game and we have been a couple since 2010. Up to today we have met twice for roughly 1-2 weeks each, he's from Sweden which made meeting him very difficult, added that my family wouldn't allow me to see a stranger (yes I agree it was insane that I went abroad to meet a stranger) and that they don't know that I'm gay. (Parents are religious) Even though the time we spent together was short it felt like it was the happiest time of my life. I graduated 2011 in Austria and somehow ended up studying in Sweden where I have relatives (I really don't remember the reason, I might not have known what I wanted to do after school or I perhaps just wanted to go there because my boyfriend was from Sweden). Even though we now are both in Sweden he lives in the south whereas I'm in the very north. We haven't met due to money and because I promised my sisters not to visit him if he doesn't visit me first. The times we met, I was traveling from Austria to Sweden telling made up stories of visiting a friend. I came out to my sisters and told them about the lie. They are totally fine with me being gay, but they couldn't accept the fact that I went to a stranger abroad. What made it even more complicated was that my boyfriend is 7 years older than me. That my boyfriend couldn't come visit me was due to that he lost his job and that he has AVPD ( http://en.wikipedia.org/wiki/Avoidant_personality_disorder) which seems to make it impossible for him to find a new job. Which makes things worse is that it causes him to have extreme bad self-esteem and depression. He is living with his parents but I don't think that they are aware of those extremeties. The only thing which helped a bit dampen his depression were cigarettes, but he couldn't afford them anymore since he lost his job. Talking to him was horrible since he didn't want to speak at all and was depressed most of the time. That's where another problem comes in. At that time I loved him unbelievably much and I hated to see him so hurt. So i sent him money for the cigarettes. Later on my mom found out about it, but I didn't tell her what he used it for. He went to see a psychologist at some point but stopped after a longer time because it didn't seem to help at all. Last year he then finally decided to catch up with school (because he abandoned it before) and theres a chance that he might study at the university after in the town im now. In 1 1/2 years I'm done with my study. I miss my family and they miss me. I'm here with 1 sister so my other sister is basically alone. What makes it even more difficult is that she easily gets used by other people and hurt. She quit her job because she simply couldn't keep up with the stress anymore, so she really needs our support. We are very family attached and I decided to go back to Austria right after my studies finish. I hope this whole story made sense, I'm not very skilled in explaining things. In 1 1/2 years I must decide between going back to Austria, or staying in Sweden. If I were to go back to Austria it feels like I would throw the only opportunity away of being together with my boyfriend, ever. Staying here in Sweden it feels like I would abandon my family. I understand that you can't stay with your family forever, but I don't want to be that far away from them either. It feels hopeless and I have been anxious and depressed ever since I realized that I had to choose. I don't know what I should do. If anything is unclear or if more details are needed I will do my best to clarify.

Thanks for the reply! Yes I have some time left but right now the question seems to haunt me everyday. Regarding my boyfriend, he is pretty much everything I could have asked for, he's funny, caring, intelligent, he understands me really well. At multiple occasions he told me that we should break up because he feels like I deserve something better. When I met him in real life, he was just as normal as anyone else, I just once found him crying in the middle of the night and he said it was because he couldn't believe that someone like me would want to be together with him. He keeps calling me insane for trying to stick with him. I can totally understand it when people say I should just give up on him, but it feels like I can't be without him. Besides it goes against my moral to break up with him because of his disorder, it would feel like abandoning him and I just can't and don't want to do that. As it is now he really just lacks the financial part, but as I said he atleast took the step to start doing something productive atleast. The reason I'm clinging onto him so much might be because he's my first real love? I also have to admit that I am one of those silly romantic people who think that love can overcome anything. I'm secretly hoping that once we are really together, that I can finally lift him up, help him get up and live. My sister seems to be a very complicated person. She's one of those who think she's always right and becomes very irritated if anyone tells her anything. She has had many hardships. We didn't expect things to happen and had already everything planned to leave for Sweden, which we eventually did. Me and my sister are one of the few she can count on, if not the only ones. Added to that, that she often quarrels with my mom. I am doing my best to surround myself with such people! I'm myself quite the introverted and not very social kind of person, but I'm trying my best. Thank you for your input! I appreciate it alot.