Burden, wants to sleep forever

I feel like a burden to everyone around me. I feel as though no one would care if I disappeared. My bf even called me "that thing" because he financially supports me even though he said he would when I quit my job to help my mother with dementia. Now I'm a burden? We're on vacation and on Saturday we went to the bar and he got really drunk and started grinding with a random girl in front of me, when I confronted him he said he did nothing wrong because he didn't touch her... well now I feel like I'm nothing since I'm just a THING OVER THERE. he even yelled at me in front of everyone at the bar. He said he shouldn't be spoken to that way and that I should respect him. How do you respect someone who blatantly does that to your face and in front of friends and strangers.