Cheating thoughts

I honestly don’t know what to do anymore. My husbands sex life was an everyday thing now fast towards to 9 years of being together and being married with two toddlers. Recently it hasn’t been the same lately. His always wanting ME to please HIM. Especially always wanting me to give him head. I’m not a fan of that he won’t force me either but he will get mad because I didn’t want too. Or not talk to me. I feel like this has been happening for awhile no where our sex is not the greatest anymore. He used to please me before. But now that I’ve gained weight it’s different. Don’t get me wrong his an amazing father and amazing husband. It’s just the sex part always HIM. Like I need to master-bate because he doesn’t please me. I feel like he doesn’t fill me up. He only think about himself. I have thoughts where I just want someone else to please me that knows how to communicate and be by here for me. I didn’t think I’d ever see myself thinking about this. I just feel sometimes our relationship is not working out idk what to do ‼️