My approaching has reached the level I can start friendly chat with anyone.

However how do you turn a conversation flirty? Im good at opening people up and having a wholesome conversation now but if its with a girl I dont know how to get them thinking from a friendly guy chatted me up to this guy wants to fuck me and so do I

Past two times i get numbers go on date they seem to have thought i wanted to be friends and get uncomfortable when i attempt kino