Issues with weight.

Hi. I'm a newbie on this site so not sure of protocol.
I am 64, 5'5, 140lbs, healthy other than occasional AF and taking beta blockers, statins, blood thinners.
My partner of eight years has always had issues with larger ladies (he's quite thin) and when I first met him on line my weight was at the top end of his preferred body size (143lbs) and I was on one occasion told I could do with losing a few pounds. He has just informed me that if I gain weight (regardless of the reason) he will neither love or fancy me and will have to look for another relationship. Also if I ever become so ill that I can't 'pleasure' him, although he would probably stay around to look after me, he would find someone else to fulfil his physical needs. He thinks this would be reasonable and if the boot was on the other foot he would give his blessing. Well I'm a bit miffed (to say the least!) to be honest. He's never been one for complimenting me, and he's probably told me (in anger) that he doesn't love me as often as he's told me that he does (and rarely spontaneously) and he does find it difficult to express emotions other than anger. Should I be angry about this or not. Am I being unreasonable? What do others think and if any guys read this I'd love to hear your opinions.