Gesture to apologize after a BIG fight?

My boyfriend & I got into the biggest fight we’ve ever had before last night. We fought for the entire night last night. This morning we were able to communicate a little better but we didn’t have a lot of time because he had to go to work. I know he’s still insanely mad at me & I want to do something to show him I’m sorry, I understand, and it won’t happen again.

Does anyone know of any ways to apologize & make your man feels valued & heard after a big fight? Obviously we’re going to communicate more but are there any gestures I can do that are meaningful & not cheesy?

PS if you’re wondering why we’re fighting it’s because I didn’t tell him about something from my past, it wasn’t because of cheating or anything

Please help me ladies ❤️ I could really use my girl advice