So, I just beat undertale, and I got the neutral ending. At the end,
Flowey told me that I wasn't a good enough friend to Papyrus and Undyne. Then I talked to Papyrus, and he said Undyne wants to beat me up.
Now, I have the same save and all of my progress. I already went on a date with Papyrus, but now I can't find out how to befriend Undyne. I thought that I had already befriended Undyne, since after fighting her:
I poured water on her armor so that she wouldn't die.
Apparently that isn't enough. What do I need to do next?