Mirai Nikki
Assassination Classroom
Fairytail
Your Lie in April
Shokugeki no Soma
K-On
Orange
Okusama ga Seitokaichou
Your Name
K Project
Coppelion
A Certain Scientific Railgun
Barakamon
Non Non Biyori
Yuojo Senki
Made in Abyss
Of course the speed you can redevelop your friendship depends on you both, whether you've both changed a lot and whether you are both commited to the friendship. Good luck :)