Am i controlling?

My bf's social media is full of women, and half naked women. Along with women dancing, working out, etc. I ask him why he keeps looking at girls online, and he started making a big deal that im controlling, for not wanting him to look at girls. He started making a fuss about having to delete his social media, and never look at girls, saying that he cant live without social media. But, i never told him to stop. I only ask him why he keeps looking at them. And i have ask him to unfollow certain women, but he refuses. He told me i shouldnt worry, cause although theyre prettier than me, he chooses me. He said they dont matter. But, he has stopped wanting sex for 4 mths now, and rejects me everytime. Cause he masturbates instead. He told me i cant keep doing this to him, or he will not know how to live w me. He said i need to focus on how he helps me with my kids, and with my car. And that he chooses me over anyone, no natter if theyre way better looking than i am. Am i being controlling? Or i should leave him for wanting to keep living in his fantasies, while im mothering him.