I have some gut reactions to this and so I guess I'll just tell you the thoughts first coming to mind.
I'm in a relationship with someone with varying health issues and sometimes you could say she doesnt love or care for herself enough. But honestly I would stick by that girl absolutely 1000% no matter what. I have health issues too and I do sympathize and empathize with a lot of it.
Honestly early on in our relationship it was made clear we were meant to be. Weve also been together over 2 years..plans for marriage and I have not a single shadow of a doubt about it.
I think for one thing..I think you need to question why youre needing answers from other people on if you should stay with this person. I dont mean that rude. I just am thinking about past relationships ive had where I would ask people for the same kind of validation.
In my relationship now..I dont think I would have to question for a second if I should stay with her.

With that said, your situation might unique and maybe right now youre just feeling some doubts and not sure where to turn and thats okay.

The relationship I'm in now has taught me that its not about everything being sunshine and rainbows all the time. Love isnt this fairy tale thing..there are just fairy tale moments. When you truly love someone..you take the good and the bad and you work through it all. You have good communication..and hard conversations at time. If you truly love them..youre willing to work on hard things together.
Of course theres boundaries there like I'm not saying to stay in a toxic situation. I'm just saying..love isnt always what its painted as in movies. Its a team effort of facing every day issues..and supporting each other through the others individual struggles.
You have to ask yourself what are your boundaries and what are you able to compromise on?
Everyones gonna have different issues and things to work through. Its just a matter of whats okay for you. I hope this helped a little. I truly wish you the best!