That made me tear up because I know exactly what you mean. You get to a point where you're "fine", but little, random things will still catch you out. And sometimes, you're really surprised what you're ok with, and what makes you cry.
I used to inwardly roll my eyes every time someone cried at something I didn't think was particularly sad - like a children's movie. These days, my emotions sit so much closer to surface.
I think having spent so much time crying, my body has created some kind of defence system where if anything upsets me now, I'm so much quicker to cry. You cry out stress hormones, so crying - rather than being all British stiff upper lip - is actually good for you.
And now, by the end of writing this message, that initial sharp pain of shared grief has lessened. I really did judge people for crying at the drop of a hat when I was younger. These days, I think they're really smart and have learnt the best way to process their emotions so they can function and keep going.
PS I've never deleted the phone number either. I don't think I'll ever bring myself to do so.