my husband is constantly begging for sex. he always complains how we used to do it so much when we…

my husband is constantly begging for sex. he always complains how we used to do it so much when we were dating but we only saw each other on weekends.....I'm only just starting to get my drive back after having Hazel. he saying he needs it everyday....I want to say dude chill out. I'm not gonna lie he has gained quite a bit of weight after leaving the military so that in itself doesn't turn me on and makes it hard for me to be intimate when your partner gets to tired to continur. but I still love him a lot. I tell him to take baby on walks and get in shape again....idk makes me feel horrible but I feel like he will cheat if he doesn't get it enough