Signs a guy you met online is stringing you along through text?

I asked him what he wanted he said he’s looking to meet someone, enjoy their company and see where it goes but he doesn’t want a friendship, definitely serious. We’ve been texting for 2 weeks non stop, he calls and flirts a lot but only in the evening/late night. He’s kinda high status and a famous pianist. I asked him a second time if he was leading me on and he acted surprised and said he wasn’t. What are the signs a guy gives when he is stringing you along?
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I mean he’s only called twice
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