Most likely it's a mixture of both.

You're 22 and he's 23. This is the period of his life where you should both be having frequent sex.

Let me tell you something - me and my bf had the same problem and it got to the point where we tried to have sex and he couldn't get it up like 5 times in a row. Honestly? When that happened I started thinking of how I was going to break up with him. I had already told him it was porn that was doing this but he didn't believe so at first. I started distancing myself emotionally and physically and I think he picked up on this, because he quit porn cold turkey that week. To my knowledge he hasn't watched in about 6-7 months and we haven't had any problems regarding intimacy since then. In fact, it literally just keeps getting better and I would say this is the best relationship I've ever had.

If he cared and is attracted to you he would do the same. He's already pretty much confirmed he's not attracted to you - he doesn't even try simply cuddling you. Even when people have a low libido period they still crave touch in the form of hugging, cuddling, etc. You can try talking to him again but you need to set a boundary - this behavior changes or it's over. It's simply not a relationship if there is no emotional or physical intimacy of any kind, and I doubt you want to live the rest of your life like that.