We Haven't Had Sex In A Year

Hi! My friend and I have been together for a year and three months, and before that, we were friends for about 2 years. At first, everything was great, the sex was unique, we did it almost every day and so for 3 months. He and I relaxed a lot and, as we were weak and fit, we went 7-8 and the sex was there... He was fat for many years and losing 20kg was crazy about being skinny. I'm also anxious about weight because my weight has consistently fluctuated. We try to lose weight, but the will is gone, and when I tell him about sex he frowns and gets angry and always says he is, "He's not even wearing only: two T-shirts, 1 pant and 1 blouse, and most of the time he's at home in shorts. He hates himself, and he doesn't do anything. I know there is no other because I know him perfectly +gives me his phone without worry and never goes without me (it's his decision) Please give me advice. I really want to be like before and I miss sex very much It's not normal, but at least 5 times I've opened the theme and every time I hit a rock :/ I'm 21, he's 27