I usually tend to think the "funny" buddy characters in avns tend to be very annoying most of the times. And while Cooper still partly has a annoying and immature attitude i dont really mind it in his case.
I really like how supporting and sincere he is when it counts and how genuine their friendship is, feels like brothers and Cooper's wife was right to call it a "true ride or die" friendship. Even his badmouthing of Allison (who is my fav LI) is just his way of trying to help Jake to cope with the breakup, i dont think he has anything against her and knows that it was Jake's fault.
Its just that his loyality to Jake is more important to him than reminding his friend of his fuckup and i really like how this loyality seems to expand to Lilly.
A render i really liked about Cooper and their relationship even tho he's in the background and Jasmine is the obivously excited one but Cooper's smile seems so genuine and wholesome haha