How can you tell if a girl is single?

Question

or how can you ask if a girl is single without making yourself sound like you r too interested.

Answer 1

a) girls that are single tend to be less confident in themselves.
b) girls that are single tend to be more obsessed with their looks
c) girls that are single tend to look at guys more
d) girls that are single tend to hang out in large groups of girls.
e) girls that are single tend to study all the time
f) girls that are single tend to have something to complain about all the time.