Maybe it would be okay to go ahead and let her see you cry, too. Be honest about the feelings and the roots of where they come from and give each other permission to feel and express those feelings in a safe space together. Suppressing, hiding, and covering stuff up only ensures it will reappear another day in some other uncomfortable way, via some kind of symptom, from what I've experienced. It always comes back.
I used to feel like I had to hide my emotions as a kid, too, for fear of upsetting others, and for a couple more decades once I became an adult, and wish like hell I could go back and change all of that.
I wish we all could have freely and openly discussed our feelings, especially the super unpleasant ones, and kept it real with each other rather than spending my life having to hide, put on masks, and lie about my feelings and suffer in silence, all alone, then spend the rest of my life having to go back and try to connect all the scattered dysfunctional dots of self and others to make sense of it all.
Either way you look at it, it can be a scary unpleasant scene. But being empowered with knowledge and understanding of the real deal instead of armed with the fear of uncertainty and misguided perceptions can make such a big difference in how we look at and deal with things. Best wishes for both of you in your pursuit of getting through these days.