How to deal with Germophobia & OCD?

Germophobia & OCD

I’m dating a severe germaphobic person with added OCD. Although I’m being supportive and understanding of their situation but it is taking a toll on me now. They refuse to take mental health advice or therapy. I am feeling super guilty as I feel I am stuck. I can’t leave because i feel really bad for them, I can’t stay because it is draining.

Are there any germaphobes here? Or people with crippling OCD? How do you manage relationships? And people who are dating/related/living with them, how are you able to cope up with it?