If I contacted my ex after a year and a half, what would he think?

We haven't talked since the break up but he told his sister/my best friend he wanted to be friends with me again.

He screwed me over basically for the girl he told me he didn't like, and got with her right after our break up.

But now I think he's getting annoyed with her and even though I don't want him back whatsoever and I don't see him like I used to, I don't want to have to hear from him about the amazing girl I got left for.

I want to leave our past in the past and move on as friends because after so long I don't want it to still be awkward when we're around each other. If I texted him would this be a bad idea? What would he think? I don't want him taking it the wrong way.
Good Idea, he'd see it as friendship
Vote A
Good idea, but its hard to see how he'll take it
Vote B
Bad idea, he'll see it as you wanting him
Vote C
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If I contacted my ex after a year and a half, what would he think?
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