Trouble Getting Hard

I’m 17 and my bfs 18. At the beginning of our relationship he got hard all the time and fast. But now we’ve been together a year and a half and it takes so much more work to get him hard. I find that I’m the one now who initiates sex and he kinda just sits there. He wasn’t like this before. Tonight we had a round of sex and it was great but then later on he couldn’t get hard. I kissed him, he sucked on my boobs, I grinded on him, played w his dick. I tried everything and nothin was happening. I’m already so self conscious and now I can’t stop crying. I just feel like I’m not good enough anymore. He tells me it’s not me and that he loves me but at the same time he says porn gets him hard right away. Which just made me feel even worse. He said maybe we have sex too much. So now I just feel like he doesn’t even want it. I miss him being all over me and wanting me and now he says he doesn’t try as hard cause he’s used to getting it all the time from me. I know he loves me and feels bad abt this but I’m so upset rn. Advise? Thoughts?