If he is a cheater and it's happened more than once like it sounds like please do not attribute this to addiction and/or his bipolar disorder. It has absolutely zero to do with it. I am bipolar and have always been faithful to my SOs whether it was a gf or a wife. Yeah I'm single now but both times it was do to their infidelity or need to be with others not mine.

He doesn't sound serious at all and he's using you as a play thing, as you say, a safety net. He wants to keep you stringing along and I get the feeling it's like just in case he runs out of other women to mess around with if you ask me. Why else would he not want to be with his soulmate? It makes no sense that he's calling you, texting you, won't let you go but won't have you all the way?

He's not worth it and he's playing a game that you don't need to be a part of. You fell in love quickly? Rarely does love that happens so fast = long term stability. The fires that start so fast unfortunately either burn out quickly or are full of explosions along the way in one way or another.

You need to walk away and if he's serious about getting better he will do it faster when you really cut ties off for awhile. If he is, he'll do that and you'll have a better man in the end, if not... you're free anyway.

I wish I had better news for you but it all sounds bad to me. My heart goes out to you *hugs*

~s4