Guys - When a guy says "give me a call sometime", what is he really about?

So this guy asks about me, talks with my family then months later when I contact him by email to say hello, all he has to say is "really nice talking to you, give me a call sometime" Honestly, what the hell does that even mean? If he really wanted to talk wouldn't he just ask for my number (I replied by giving him my # but he never called)?

Guys - When a guy says "give me a call sometime", what is he really about?
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