I'm sure not an expert (and haven't even slept at Holiday Inn ... that's a commercial for those that haven't seen it) but I would say welcome to MLC. Somewhere you don't want to be but don't really have a say or choice in the matter.
I've had the same "type" of "on again" "off again" relationship for the last 10 months. You can see it here Help-losing hope
I'm not sure what to tell you as I'm not in a good place at the moment as I'm beginning to feel this time might be the grand finale. However, what I have decided to try is to just be his friend. We are and have been best friends as long as we've known each other. So, I thought if I just forget we have anything except that - maybe I won't expect more and he will feel less pressure. I can still stay in contact without feeling something is missing.
You might try that but with these MLC'ers anything that works today will not work tomorrow.