It sounds like you've reached the end game of Book 2's Love Route. Try leaving the city at night or visiting the tower at night.I'm currently Hardstuck at Book 2... Cam back from Ember Island and I can't do anything..
Day 79
Azula won't train me anymore
Mai is pissed and I just can buy stuff at the shop nothing more
Iroh is:"Need something Nephew? I Think not"
Commander is doing anything with me
In Tavern I only can Serrve drinks
Leavy city is already maxed since all enemies have 1000hp
Shady guy has nothing for me