Is he addicted to porn?

Hello ladies! Me and my fiancé have been together off and on for five years. We want to start having children but no success yet. I came here to post because I need some advice or insight. I'm 30 yrs old and he's 24. We have great sex and satisfy each other every time. We rarely skip a day without having sex and that is why I'm upset and writing this post. He is always watching porn!
I try to tell myself that at least he's doing that and not sleeping with other women but it still kinda bothers me that he feels the need to watch it. I don't know if I'm overreacting or if it really is wrong and could be a problem. I don't know what to do or what to say to him about it. Any ladies out there have gone through this or is currently? If so I would love to hear everyone's thoughts on this subject.