No intimacy and sexless relationship

My boyfriend and I have been together for over 10 years now we have been trying to have a baby almost that entire 10 years with no luck but our sex life was still always amazing we would have sex all the time the first few years then as life got busier it was only a couple times a week but fast forward to last year we only had sex 30 times this year we have only had sex three times and that was last week and 2 of those 3 times were in the same night . We don’t kiss as much anymore , we don’t cuddle it’s really sad . I’ve gained 30kgs in the last 2 years and I wonder if that’s the reason, and I also wonder if it’s because we have been trying for a baby with no luck and he’s Associating our infertility with Sex ms it’s making him not want it ?! I dunno but I’ve brought it upto him and he says he’s just not horny lately but he still loves me blah blah blah, but I just want a sex life im embarrassed for myself