Help help

So my boyfriend of 2 and a half years use to be absolutely obsessed with me constantly hugging kissing having sex etc but now he turns away from me when I ask for a hug he won’t kiss me much when I ask for sex he just says he’s tired or he can’t be bothered or turns over and goes to sleep? I suffer with really bad depression and anxiety so this makes me feel not good enough I just feel fat I’m 18 and about 14.4 stone and about 5,9 is that overweight? And what should I do about him I’m so confused right now