If a girl starts out all casual with a guy and she doesnt tell him that she wants a relationship it will never become a relationship. If you give the guy the impression that casual is okay with you thats all hell ever want. Be straight with him from the start. If he gets scared and runs away he wasnt right for you.
Have you ever noticed how when youre happy time seems to pass by fast while when youre miserable it goes real slow Life would have been a blink with you whether it lasted a millennium or a month.