Your sims now will never decrease in their relationship points over time, they can only increase. They will decrease in points if you preform negative socials, or get rejected for a social, but they don't decay over time if you do nothing to the relationship. So you can keep your sims in good standing relationship wise with others without having to invite them over or chat with them on the phone. This is mainly a cheaty type mod, not real for real life, but it always bugged me how sims relationships decreased with time. This mod may have been made before by someone else in the past, but I made and tested this mod myself, I assure you.