He won't stay hard to me. I need advice!

Hi,Recently, my boyfriend (32;M) has begun to not get off to me (23;M), in fact even "needing" porn to get off. I understand bringing porn in the bedroom, but needing porn as the only source of stimulation bothers me.He has stated recently that he finds it hard to stay interested in sex and finds things getting "boring" doing the same thing over and over again. He also doesn't know why he is feeling this way, because he does truly love me.I know he tends to overthink some of these things, as he asks me if I think things will be boring five years down the road. I think he's worrying too much about "what if" moments and not trying to enjoy the time we are spending with eachother.I need some advice, and badly. I love him very much but I cannot be stuck in a relationship that doesn't have a sex life.