Friendships will decay faster with this mod. The mod also tweaks the friendship stats so that you will need higher values to become friends (50 instead of 35) and good friends (90 instead of 60).
It also adds icons so that you can easily determine who your Sim's friends are.
I let unplayed Sims age up but there are some Sims i don't want to age up at all. You can use MCC to flag Sims one by one but i wanted to be able to add/remove a No Aging Trait easier. So i added a Pie Menu to Computer/Tablets where the No Aging Trait can be added/removed to Sims (mind. Age Toddler)