I think something is wrong

I’ve been depressed and some days I have good days and others I’m faking like I have a good day. Me and my partner haven’t had sex in a week. We’d watch tv and go to bed and I try to fall asleep quickly so he doesn’t try to have sex with me. Well this morning he wanted to have sex so I tried. And I just wasn’t feeling it. I got out the bed and told him I didn’t want to have sex. That lead to an argument and he thinks I’m cheating. I’m not but I can see why he’d think that. Idk. I just don’t feel like myself. I gained 60 lbs and I just feel gross and my sex drive is almost nonexistent. I really think something is wrong with me. I project and say I don’t love him anymore but I think I just don’t love myself. Idk why he’s still with me. During this time I’ve been nasty and my attitude is horrible. All because I’m insecure and hating myself. If you read my vent thank you lol.