Keeping it up

Abigail • Twenty one. Still taken. Still tired.
My boyfriend has hyperthyroidism and although the foreplay is great and everything I need, the sex lasts literally a minute or maybe 2 because of it. I love him but sometimes you just want to keep going, and he can't. I know it makes him feel like shit thinking I'm dissatisfied and of course I always reassure him, but it doesn't. Anyone know of any ways (besides medication) to help with this?