No Nookie??

HELP! My boyfriend and I have been together for five+ years, I’m 35 and he is 45! A little less than two years ago he crashed on a motorcycle and broke his arm which needed surgery and in the recovery process him and I both put on a few extra pounds!! Since then he has lost all desire for sex... we’ve had sex maybe 4 times in a year and a half! When I talk to him about it he says he wants to “get back at it” but then it just never happens and I don’t know what to do anymore??