STUCK IN TEXTING PURGATORY! How do I get him to Facetime?

So I met this guy online (it was a set up). We've been texting back & forth- and to put things more into context, I don't think he's interested. He's reserved- wouldn't share anything about himself. He's ghosted me for 2 weeks- and then came back- & I made him apologize for it. He's testing it from time to time- & I think we're playing the chase game. & we both don't text back right away. But there are other things too! He's double texted me 2 days ago, very friendly, etc
Anyway, I kind of want him to call! I know it's not coming from him- how do I casually bring it up?
Guys how do I do it?
STUCK IN TEXTING PURGATORY! How do I get him to Facetime?
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