Guilty for not having sex...

Does anyone ever feel pressured to have sex and when you say no - because you're tired from working, cleaning, cooking and have a one year old - your SO gets butthurt and you end up sleeping alone? 
Trust me I'm still attracted to my guy, and we still have sex and/or I'll go down on him a few times a week, but it's gotten to the point where I feel like he has a sex addiction and will get to the point of saying that "sex this morning didn't count because that's the morning" or "I need to cum twice a day"...And the more he does this the more it pushes me away to where I just wanna go to sleep and avoid it altogether. 
We've been together for 7 years and have always had a good sex life (almost daily for years), but he doesn't seem to consider my feelings or respect when I'm not in the mood. Mind u sometimes I'll even have sex or give him head because I feel bad and I know it's important to guys. I don't know what to do I'm tired of feeling like that's all I'm good for and sleeping alone because he's being a baby! :(