Relationship problems

So I am 17 and so is my boyfriend we have been together for almost 3 years. We have had arguments a lot obviously no relationship is perfect but he is never horny we never have sex and he is just not attracted to me sexually. I have spoken to him about it and he says every argument we have makes him just a little bit extra less attracted to me. What can I do for him to go back to like we first were. When we would never fight and have sex often now we are lucky enough to have sex 1 every 2 months. Please help and be nice it really hurts me 💕

We basically live together I’m always at his house. It’s getting the the point where we hardly kiss and when we do I always say”kisses” and it’s just a peck you can just tell he dosnt want to