Boyfriend doesn’t want to have sex

So, bf and I have been together for about a year.

He moved to FL and I’ve been visiting him for a week almost every month. Ever since he moved it’s like he no longer wants to have sex. We cuddle, hang out, talk, we speak every day, etc etc. but when we’re together we don’t have sex at all. And if we do, it’s for 5 minutes and then he falls asleep. He won’t ever orgasm either.

There’s been some infidelity on his behalf but I’m not sure if that lends to it.

This is hard. ☹️

Any advice?