giving up on this

My partner has been rejecting sex, head jobs , anal. Everything that he loves, even fisting and now I know why I have caught him watching porn as he is having a shower. He walked out with his phone in his hand and a massive boner. Am I not fucking good enough !!!! Why is he choosing this fucking disgusting porn and not me!?!?,!:& I'm furious I don't think I can do this anymore