How to navigate dating with chronic fatigue/illness

I'm a 31-year-old guy (trans if that matters). I have a horde of medical and neurodivergent conditions that have made certain social connections very difficult, especially in dating. I'm diagnosed with insomnia, polycythemia, ADHD, OCD, and experience frequent migraines and mood swings (all of them chronic). Because of this, I was committed to a life of being single, or at least until I got these conditions more under control. A few months ago I met an amazing girl (29F) through a friend and we fell in love. I did not mean to get into a relationship, but alas here I am. She's very healthy and neurotypical. I've explained my conditions and she is very understanding.

However, there are times when I've needed to cancel our plans at the last minute because of my fatigue and/or migraine and she's expressed disappointment even if she knows I can't help it. It's also hard for me to travel, but this is something she'd like to do with me. And of course I want to keep our plans and travel to different places with her but my body just doesn't always allow it. I care about her and our connection a lot and I want to be able to engage in our relationship in a "normal" way and I'm very frustrated that I can't. I fear that she will grow tired of having to accommodate me. This makes me feel like I can't be in a relationship and hurts my confidence.

How do you guys navigate this?