tell me why...

wherever i see my ex boyfriend around, i make this stupid expression like "AH! why is he here?!" or "do i really have to see him here?". whoever says his name i make this funny expression like "oh! he's around?!" or "HIM?!!!". some people ask me. "dude? why do you care?" or sometimes, "you're not over him yet are you?". whatever reason i give them, they just don't believe me nor accept my answer. i meant, they kept asking and when i answer they never believed. what's the point of asking right? but all i know, i'm telling the truth - i don't like him anymore, or i'm so over him. but i also know that i do give those expressions. ALL the time i see or here his name. why? it's normal for someone who got dumped right? and you find it hard to move on and forget the person who actually broke you're heart? i'm sure i don't like him anymore, i see him but just a friend. i know same goes for him. but why do i feel this? i feel so nervous whenever i see him, i feel like so unprepared whenever i'm gonna talk to him? can anyone please tell me why??!!

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thx =)