What does that mean exactly?

Chatting over text with this guy and girl I’m friends with. I said something and the guy said since I know that I’m more attractive. It was a joke regarding something him and I were chatting about privately earlier. The girl (who didn’t know the full context of what he was saying), said, “ wow, more attractive, yeahhh”. What could she have meant by that. Could it have been that she actually thinks I’m attractive so him saying I’m more attractive isn’t true.

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Afterwards he texted me privately asking about getting lunch over the weekend, and he said to ask the girl and said she will come only if I ask her and that she won’t refuse me also.
What does that mean exactly?
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