I have a friend and a brother who are bi-polar, they aren't the type to get into a relationship with. They become easily possessive, even with the medication. When they don't take medication, you can see how bad and crazy they can be(sometimes abusive). If you don't want to risk a relationship with a possible emotional headcase, then I'd suggest you cut ties before it becomes an actual thing. I haven't met every bi-polar person, but this is pretty much what I've seen so far from them.