Boyfriends paying for only fans

So my boyfriend and I are pretty open and I told him I don’t care for him watching porn in general.. but he said he’s been doing it since he was in middle school and he can’t stop a habit.. so I was learning to just get over it but then I started seeing where he had opened links to girls only fans and started noticing it was like 40 and 50 dollars a month just for only fans coming out and so I figured I was over reacting so I told him I wanted us to make some videos for him to use instead of him paying for other girls and it still didn’t help at all.. he said he has quit subscribing and stuff but I can’t help but assume he’s just being more sneaky since I overreacted. Any advice ?? Help a girl out it’s seriously taking a toll on my self esteem and mental health.