How about broadening your support system? Come visit us at the bipolar forum if you haven't already. We are there 24/7.

I don't know what your conversations mainly consist of, but he maybe frustrated that he cannot "fix" any problems that you are going through. His frustration may be exacerbated by lengthy phone conversations even if venting helps you. My partner has bipolar disorder and I do, too. We can wear each other down if we aren't mindful. I imagine it's more challenging in your relationship because he can't truly relate to what you are going through in managing your illness, nor can he fix it. Plus, you are long distance so he can't give you a hug.

I may be off base here but I wanted to post it in case it helps. Hugs to you. xo