Most Helpful Girl
Pretty much the same way you speak to guys, but less about sports or boobs. How do you speak to a guy you're trying to befriend?
Make your intention to make (female) friends at the start, if you feel like the girl is a nice dateable person who also seems to like you, it's time to actually flirt. Stand a bit closer, look her in the eye while making slightly dirty jokes... I had this guy I kinda liked walk up to me with 2 bananas. He wickedly smiled at me, described the shape of the two and then asked me which one I liked better. Funny, original and daring. It would've been creepy if we weren't friends yet though.1
Most Helpful Guy
You'll always look desperate in girls eyes whenever you approach them.
Hence why girls timidly ask here "Will he think I'm desperate if I approach him?" where us guys reply "Noooo!", just so that girls start to approach.
So, girls think they look desperate if they approach guys - and vice versa1