Can one be happy in a sexless marriage???

My fiance and I have been together for over three years and are getting married in a year. (Both 37) We have a dam near perfect relationship with an undeniable connection. However our physical relationship is slowly declining. Sex has come down to like once a month and even then, ends up happening in the shower where it's quick and easy. We don't make out and kisses are short and sweet. The lack of intimacy is coming from his end. We've talked about it numerous times and all I get is "it's not you it's me, I've just become lazy" He always says he will try harder but it never sticks. He is affectionate in other ways like cuddling, holding hands, spooning at night, ect. I can't imagine life without him, but can I really be happy without intimacy??? Any advice 😔😔😔