Hi! You can use the same relationship variable for this plugin and Complete NPC Dialog Solution. That is actually exactly why I created this for my own game! I'll also be updating the Relationship Window plugin to show loved/liked/hated items as players discover them through this plugin.
You can disable the interaction prompt by setting "Show Nearby Prompt" to false.
Note tags would not break interactions with Dynamic NPC Routines and should not break interactions with Community Lighting. I have not tried the latter so cannot be 100% sure but if it's a lighting plugin and the only thing it also does is use note tags then there should be no issues.