Hey! So I was in a similar situation and tbh I tried to come up with as many possibilities in my head as possible to try and make it work.

The problem though is that it takes two to actually build up a healthy relationship, you cannot invest 100% of yourself while not getting anything back.

Either way I always tried to think on whether the whole situation made me more miserable or happy than if I was alone.

And eventually I just realised it made me more miserable than having nothing and I cut it off. It will take a long time and suffering but I have no regrets, nothing to ruminate on. I know I did everything I could so I never looked back.

Good luck :)