When I get back to my desk after a meeting, I remember how we used to laugh at the beginning.

When I get back to my desk after a meeting, I think of how we laughed like we used to when we found our way back to each other.

Scenes

I remember how we used to laugh at the beginning. — When I get back to my desk after a meeting, I think of that moment when we found our way back to each other and laughed like we used to.
It felt good to see each other again — When we met again after a long time, laughter came easily. We didn't bring up why we'd parted.
Why you first parted is still there — It's hard to ask why you first parted while you're laughing together again. If you skip that conversation, the joy can briefly hide the reason.
Tonight, write down both things — In your notes, write “Why we first parted” and “What has changed now” on separate lines. Then notice which one comes to mind first.
Look at the day you reunited, too — If the memory comes back, you can look at the two lines you wrote. You can also notice what has changed as you spend time together again.