Why do I feel like puking when I bumped into my ex?

We broke up 4 years back. It ended on cordial terms. Last day I saw his picture. He looks the same but I feel like puking.

He is now surrounded with a materialistic lifestyle and pretentious people and has completely changed.

Am I hating him or his new ways of life?

Why do I feel like puking when I bumped into my ex?
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