Wrapping up a conversation politely

I bumped into an old colleague at a coffee shop last Saturday, and we ended up chatting for a good forty minutes. I don't want to keep you , I said, even though I was the one who needed to leave—I just didn't want to seem rude. It's been great catching up , I added warmly. She smiled and said let's not leave it so long next time . I completely agreed and mentioned that we should pick this