Mental health

I'll try to keep it short. I've been seeing a guy. I have anxiety and depression. So does he. We don't live together. Everytime he has a low or he's triggered he blocks of the world, including me. It could be a day, a week he'll just disappear. I delt with it and I find that so hard! I've spoken to him about it before. It's starting to effect my mental health setting me off in anxiety attacks, making me think I'm not enough. I can't mentally take the ignoring then coming back like it's nothing while I'm broken and hurt. I've almost ended things twice but I love him. Is it worth the demise of my mental health though? I'm so cared because I don't want to upset him. I want to fix this but I can't hold him up all the time when I can't even do that for myself.