<human>: Mine [20f] and my boyfriends [19m] relationship has been going on strong for almost 4 years now. Or so I thought, because lately I have noticed distance between us. My boyfriend suffers from depression, and he also has the type of personality that wants to be alone most of the time. However, I am the polar opposite, I love spending time with him. I enjoy talking to him every day. (not in an obsessive way, but in a normal girlfriend way)
And unfortunately, I've noticed that the only real friend I have is him. So when he wants to be alone, I usually get pushed to the side. And as much as I understand his need to be by himself I just can't stop thinking its something I did. 
And yesterday he admitted to me that he sometimes feels like he doesn't want me as a girlfriend anymore. But he sleeps it off and he changes his mind. He claims its his depression messing with him, but of course I blame myself. 
I just want to make it work, I want to continue what we have. I love him more than I've ever loved anyone, and I don't know how to fix this if I can....

Can you condense the text into three sentences or less?
<bot>: My long term boyfriend and I are struggling keeping our relationship together because of his distant personality, and I am wanting to find a way to find a balance and make it work again.