Alex struggles with his sexuality in this season, first kissing Zach, who politely rebuffs him. He then spends some time with Winston, who falls in love with him, but Alex pulls away. Alex, like the others in their friend group, has trouble trusting Winston, knowing who he is and what he's trying to do in getting justice for Monty, on whom the group has pinned Bryce's murder.
After the school shooting drill, Charlie kisses Alex, and the two start dating, even winning the title of prom kings. Alex is accepted to UC Berkeley, and his parents are exceedingly proud. And after Alex spends all season wrestling with having killed Bryce and worrying he'll eventually be punished for it, the police department puts the case to rest. Alex also confesses to Winston about killing Bryce and telling him why — that Bryce had ruined everyone Alex loves. Winston hands over Bryce's tape to Alex and walks away from it all.