How do i follow up after getting a girl' s number? And how do i make sure she meets me?

I got this girls number and she seemed interested, but how do i know if she really is interested without wasting my time? I don't want to waste my time on her if she's not interested, so what can i do?

What is a VPN?

VPN is (Virtual Private Network) were first used by companies to enable their employees to securely access internal systems such as email remotely (e.g. from home or while on business trips). Today they are increasingly being used for personal use by individuals to protect their privacy while online in public places (e.g. when using the wi-fi connection in a cafe) or in a country where the internet is censored / blocked (e.g. China, Saudi Arabia…).