I feel like it's already over
He might not be stable enough to maintain a relationship. He should seek medical treatment. If not then he won't get well and the ordeal you are having will get worse.
This is what I'd do...
Treat your relationship as a non committed one. Go out with others and see what happens. Just because he has mood swings/depression doesn't mean he can't see you regularly.
Its not your fault.
Go out, have a good time.
It's hard for you to believe that he doesn't want to be with you, in a short relationship, because this is the time when you are meant to have the honeymoon period.
It's so hard to say this but the only contact you can have with him is by sending him a text, saying that you will always be there for him, or even to say you love him, don't be upset if he doesn't reply back to you, that's this illness taking control of him, but it's the worst circumstance you would ever want.
At the moment you are feeling the repercussions from this and it's starting to drag you in, making you feel sad and upset, but once this continues then this illness is starting to take control of you, so there are a couple of issues here, firstly you should go and see your doctor to try and inhibit this illness, and secondly do you want to stay with your b/friend through this period, now and in the future or decide to break it off.
Remember we have to answer who has posted in and not who they are talking about, in a general way, but whether you stay with him or decide to leave won't change the fact that you still need to see your doctor, because either
I hope this works out for you, but please reply back to us. Geoff. x