What Kyle said. There's no reason to dwell on it. He should also understand that people can be forgetful. I know I am. I have huge chunks of my life I can't remember, never mind whatever I did yesterday. =P
Don't let him control you with his emotions.
It also doesn't seem like bringing poly into your lives seems like the best thing to do right now. He could be doing a lot to help you out with your illnesses.
Have you told him about your jealousy and talked about ways to get past it? Because if you really want any relationship to work, you're going to have to talk to each other a lot.
[Insert witty comment here]
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