Thank you so much for the advice and the welcome, much appreciated!

And yes, he has been treating his condition for all the years I've known him through medication and seeing a doctor weekly for talk therapy. But I only just found out a couple of years ago after we started talking again that he had a mood disorder on the bipolar spectrum. I guess he felt ashamed and thought it would scare me away while we were dating and that's why he never told me at first?

I did go with him to a doctor's appointment once and am proud that he finally let me know what he was going through, which leads me to believe that he does love me, but when he says things like "I broke up with you for a reason", it causes me to second-guess myself. I do really love him and am willing to accept the uncertainty and confusion that comes with being in a bipolar relationship, but I just want to know what it's like. I've never known anyone else in a similar circumstance/situation, so I just want to know what to expect, or "what's normal", so to speak. I will definitely check out the links you sent me; thanks again for the help and welcome!