Situation. You see a total stranger girl in your environment, go for the approach. I mostly freeze after I say "Hi", no idea what to say afterwards. I can't just say, "hey, I noticed you bla bla, let's go grab a coffee'' as the first thing, surefire way to get rejected.

So, i'm not afraid of the approach itself, I'm afraid I have nothing to say after greeting, brain just freezes.