This issue discusses a potential extension of the plugin with a friends system.

Description:

Since Marriage Master V2.0 already allows 1 to n relation ships it shouldn't be to much work to extend it with an friends system. This system could be used for further improvement of RPG elements like requiring players to become friends first and spend time together as friends before being able to marry each other.

Implementation:

A good concept and a lot of time is needed so there are no plans for now.