He says porn is better than me, will he cheat on me?

My SO was high on weed and he wanted to have sex with me, but i was not feeling it cause we had an argument before he was high too. And i was not on the mood for it.

Anyways, he got upset and said hes going to masturbate to pov porn then since i dont want to give him love. I told him to go ahead, but he refused. He says he wants to have sex w me instead.

Few hrs later, he got me into the mood. While we were at it, he lost it, and got frustrated. He told me i turn him off and that im so boring. Im the most boring and turn off ever, porn is better than me. I got upset he said that, and didnt want go have sex anymore.

He still wanted to have sex w me, and told me if i dont want to have sex or satisfy him, then dont be upset about the outcome. Which is him cheating on me. He said he will cheat on me and go have sex w someone else, since im so boring and i suck in bed.

I left him and he masturbated to other women. Saying theyre so much better than sexier than me.

Should i leave for good?