Nearing sexless relationship. Need advice (long explanation sorry)

My boyfriend and I have been together about a year and a half. When we first started being sexually active we set our expectations first thing.

1. We wanted sex as often as we could which we agreed about every other day or two days

2. Either one of us could ask/demand sex (he specifically told me I could demand sex whenever I wanted. I like asking better than demanding) from the other

3. I need to keep up on my birth control and be forward if I forget a day and condoms must always be used.

And that was the rule. We stuck to it (with a minor set back due to an injury in his part) pretty much the whole time until about 7 months ago. Sex dwindled from at least every couple days to 3 times a week to weekends only, to twice a week to what is now my sex life of once a week. If I’m lucky. There were times when we wouldn’t have sex a couple weeks at a time.

9/10 he rejects me asking for some sexy time. The other 10% of the time he either pounds away and it’s 50/50 chance I orgasm or he can’t stop cracking jokes and being silly to even have sex. Otherwise there’s always an excuse: too tired, not feeling it, stomach hurts (he has a lot of non life threatening food allergies and will “cheat” making him sick), dicks not working, ball to dick communication not working, we’ll try later and never do, had alcohol so parts aren’t working.

Yes I understand that the longer the relationship, sex life diminishes a bit.

Yes I understand I have a higher sex drive. I hold back and do solo stuff.

Yes I have tried talking to him.

Yes I have tried wearing lingerie and dresses and filling up to the nines.

Yes I have tried roll playing but that more my thing not his.

He has expressed to me that he essentially resents my need for sex. He feels that I expect him to be able to get his dick up on command and have sex all the time.

Only reason we have sex at all is because he “feels bad” that he hasn’t “given” me sex so basically the only sex I get is pity sex. If he disregarded me completely we would never have sex.

I’m basically at a loss. I feel like I’ve exhausted all options. What do I do? What CAN I do? Just tired of masturbating all the time.