so i have this friend who i kind of have a thing for and i'm not fully sure whether she feels the same or she is just a flirty type of person, on the other hand one of her friends (not particularly close but they are friends) is definitely into me and i get on well with her too. My dilemma is that if i were to start talking to her friend more and anything happened it would ruin my chances with her altogether but at the same time if i wait for my friend who i'm not sure about i could lose both of them. What should i do?