He can smash all the hoes ans skeezers he wants bro, at the end of the day, all that "Yeezy taught me" and those times where Kanye talked sh*t at his concerts about this chick shows that Ambers the one that got away from Kanye. If dude really didnt care then he wouldnt have been talking about her so much.
You gotta remember his mom had just died (RIP to the GOAT Earth) around the same time as the break up so he was confused, vulnerable ,sad, sh*t ever negative feeling you could feel all at the same time. Sure he was shaken up but he got over her. She was the past. He's moved on. Making the Beats music today and being one of the greatest musicians this day and age.