Mhhhh... I love this plugin, but there's an issue. It seriously LAGS a lot at higher resolutions (I play at 1344x768 px). It's definitely the heaviest plugin on my list and... well, it feels weird considering what it does. Does anyone else experience this? Check your FPS with F2 while you play and open the Friendship menu! The FPS will especially drop when you move from one character to the other in the friendship menu.
P.S. I have a pretty powerful machine (haswell i5 and radeon hd 6870 and 16 GB of RAM).
EDIT: It should also be noted that version 1.0 of the script worked perfectly (without any trace of lag), and that the problems started to surface from version 2.0 and above. There must be something in the way you completely rewrote the plugin that made it much heavier on the hardware. Since the FPS drop pretty much constantly while in the friendship menu, I'd guess it's some kind of loop or refresh function that gets called when it really shouldn't be.