My husband wants sex every night!

And I don’t, ugh. I feel like one making him sexually frustrated but he’s not communicating that to me. I ask him if he’s okay when I turn him down almost every night and he laughs it off and says it’s fine, but I don’t want it to end up where he resents me for it. But literally I just don’t want to have sex every night. I have a baby on me all day and I also work as a project manager which is a very demanding job, I just want to be by myself by the end of the night. I just don’t want him to start resenting me for not giving him sex...should I just give in? I’m fine with having sex like once a month, lol. I know it’s bad, he hates me haha. It’s hard juggling a job, husband, baby, and friends. 😭