Girlfriend is a domme and I’m not submissive

I could do with some more perspective on this. My girlfriend is a dominant. I didn’t initially know that side of her when I first met her, but it became clearer as time went by. She’s young so she wasn’t sure about what she was looking for, she didn’t purposefully hide it or anything

It’s not my thing, but I love her more than anything, so I didn’t mind indulging that fantasy of hers. It started small and progressively escalated, eventually becoming a regular part of our daily life

I’m not a big connoisseur of this world but I would say she’s a pretty “harsh” domme, which I don’t mind. She’s really into humiliating and tormenting me, and I’m happy to indulge. We’ve been together for 2 years, and this started about a year and a half ago. At first she held back, but seeing my openness she progressively upped the notch, and now she feels free to fully lean into her “mean girl” side

Recently we started talking about long term. She told me she feels very happy with me, but she’s worried about compatibility since I’m not a sub. Like I said love her more than anything, she’s the most interesting and attractive girl Ive ever met, so I’m willing to do much more to be with her. I told her that, and she said she believes my good faith but she still can’t shake the concern about long term compatibility. She also admitted that she particularly enjoys dominating me because I actually don’t enjoy the things she does to me, so it feels more real for her. That made me happy because pleasing her is what makes me happy, so hearing I can fulfill her desires better than most is the best compliment

What do you think of this situation? And how do I convince her to feel safe with me in the long run?