Admired Icon: can't 'Make 10 teen Friends' with Incredibly Friendly

This happened to me too, and happen in many of my played teen Sims. Because they always start with half green relationship whenever they introduce their self. But I have found a solution: using social bunny!

I added Sims who my Sim has already introduced before to contact list. Then, I spammed a mean messages to decrease the relationship until they became acquaintance, after that I spammed again with friendly messages until they became friend. Yeah I know this way is tiring, but I always succed try this way.