porn?

so the whole time me and my boyfriend have been dating (9 months) I've always knew that he watched porn, and it used to never bother me. but lately it's started to bother me a lot, because it makes me uncomfortable that he's jacking off to watching other girls (he said he only really watched lesbian porn). I told him that I wanted him to stop, and at the time, I watched it sometimes too, and I agreed that I would stop also. he agreed, and he hasn't watched it since. I told my friend and she said "wtf, guys need to watch porn. you should just let him" but it honestly makes me so uncomfortable when he does, but I also feel like a bad girlfriend when I said he couldn't. did I make the right choice is telling him I would rather not have him watch porn? also, we're both 15.