Just celebrated 5 years. We have an oddly perfect relationship. I'm bipolar and say mean unnecessary s***. He's emotionally detached and struggles being emotionally intune. This is a perfect match made in heaven because when I blow up and say things that would crush someone else, he blows it off. He gets mad, but it's pretty hard to say anything that will actually stick.
Of course this mix creates issues on its own that we have to work on daily but he makes of what I lack which is the ability to get over things quick and make up, and I pick up what he lacks which is getting him emotionally involved since I'm always in emtion overdrive.

Strange relationship that actually evens everything out. Not to mention we both are extremely stubborn so when things got absolutely terrible around 3years, neither of us would leave. This consisted of "Well, I'm not leaving so you have too." "Well, I'm not leaving so you have to put up with me!"
We went through this a few times around 2-3 years and never made it past a few days before making up.