I feel like I have to hide my smile sometimes

I've noticed for a few years now that sometimes I will get a big, unstoppable grin on my face when I catch sight of my favorite person. Whenever I see my favorite person as we're meeting up, I feel like I can't control my face and I just smile super hard.

I don't like feeling like I don't have control of my face, and I'm self conscious about how it looks. Because it makes my face feel weird, I feel like it looks weird, even though I've never actually been able to see it. I usually end up biting my tongue, cheek, or lip really hard until I'm able to do my "normal smile", which isn't fake, but feels like I am able to control it.

This seems weird to me, and was wondering if anyone else has similar experiences, or advice of what (if anything) I could or should do differently.