tldr: my bf and I have been together a year and a half, moved in together in June, he's put on a lot of weight and I don't find him attractive anymore
We moved in together in June and pretty quickly we both started putting on weight.
Whenever he cooks he always uses full fat oil and lots of cheese, sauces etc. I put on about 5kg in the first six weeks of living together. I'm not sure how much he has put on exactly but he's now 110kg and 6'2 which makes him obese. I'm 5'6, at my heaviest I was 70kg, I'm now around 65kg and trying to get down to 58-60.
When I weighed myself and saw I was bordering overweight, that was a shock as i've always been pretty slim. I took over the cooking and primarily eat lean meat, fruit and veg. My bf will what I make, but he add mayo or oil to everything like he wants every meal to be as calorie dense as possible.
He always complains about his weight, says he feels gross, his clothes don't fit him well. I have done my best to be supportive by cooking him healthy meals, offering him my gym pass so he can use my gym inviting him to join me on my runs, I even booked us a tennis court so we could start playing tennis together. But ultimately, if he just eats my healthy food and then eats donuts, cakes, muffins after, I can't stop him.
He keeps his shirt on during sex and I don't enjoy it anymore. It's now a once a week thing that I feel like I just want to get over with, his belly grosses me out and I find him keeping his top on weird. It's also not attractive watching him gorge on junk food every night while he's complaining about his weight.
Last night I told him that the chemistry wasn't there for me anymore. He got snappy as he felt I told him at a bad time (we were in bed about to go to sleep) and then said "fine, noted". I apologised this morning for the bad timing and if I upset him and he said, "no i agree, i feel disgusting i hate looking at myself in the mirror".
I'm not sure where to go from here, do I should keep trying to be supportive or if I should just let him get on with it? If he stays this way I know I'll have to leave because it's not fair on either of us to stay together if I don't fancy him anymore but it feels like such a sad and avoidable reason to end a relationship.