Weight gain and blue balls...

Annie • 💍10/7/17💍. 🦄Mom to a beautiful baby girl🦄 .
So recently my fiancé has gained a large amount of weight. When and how would be a good time to tell him that he needs to slow down and start trying to lose it? Recently I've become less attracted to him and it's killing our sex life. Not only is my sex drive gone but when I do give the okay he can't even get off because he is so big. He gets sick and pukes. I love him but I just can't have a relationship without sex. I'm an Aries and I need the physical part of the relationship more than the feelings. Can someone give me tips on how to talk to him and how to make it to where it's easier for him to cum? He even says mastrubation doesn't work anymore and he used to be a Cronin mastrubation. Please help me save my sex life!!!