Why am I not his type?

So, I still have feelings for my ex and I’m so hurt right now and I know social media doesn’t mean anything. But, he went from liking girls that look like me to liking girls that don’t look like me. He likes heavy set/thick Latinas now and I’m honestly starting to think I was never his type. Majority of the girls he’s talking to are Latina now. I know he was really hurt after i broke up with him because his friend told me. But, I didn’t think he would change his type.

Why am I not his type?
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