Ex ignored me until he got married?

Now that he's married (last 2 years) he doesn't miss a chance to greet me and gives some stares too, before that I couldnt even see him now it looks like he makes himself available which i find weird and he also shows off his baby and I don't know why but i do wanna know why he ignored me for so long and now that he's married and has a baby now he's very eager about me, i ignore him bcs he's married obviously
Ex ignored me until he got married?
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