How would a girl respond to "let's hang soon"?

Ran into a family friend last night who I hadn't seen in years. He's a cutie too, might I add. We exchanged numbers and I reached out to him this morning to say it was good seeing him. He responded with the same thing and added lets hang soon. I don't know if he meant it in a "friendly" way or an "I'm interested in you" kind of way. What would be a good response to this?
How would a girl respond to "let's hang soon"?
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