Help needed and advice!

So my s.o and I been together for almost two years on and off. But lately he’s been having problems being horny and it’s driving me insane! I’ll ask him if he wants to have sex he’ll be like I’m not horny. We’ll be making out he’ll get hard but says he’s not horny but he has no problems watching porn and jerkin it. I said maybe you should cut back and he did, it helped a little. Got to the point where I broke down crying and asked if he was happy and if I did something or need to change he said he’s happy and he loves me a lot and I don’t need to change.He said it wasn’t a big deal. I told him I don’t want to be in a sexless relationship he said we’re not (had sex 3days out of the month not this month) I know he’s not cheating on me or anything. I need advice!! (Also asked if he wanted a break and or breakup he said no and he doesn’t want me to break up with him and that’s what he’s afraid I’m going to do.)