When is the right time to give up?

Hi steemians, when is the right time to give up on a girl u have chased for so long . I met a very beautiful girl more than 6 months ago, but all my efforts in wooing her have all fallen short. At the beginning I never thought it will be this hard cos she was showing me some signs that made me thought she was into me, but as tym went on I discovered she was not and I have been doin all I know to woo her since then, but she's not falling through, she hardly sends me a chat msg and reluctantly reply my msgs. She clearly told me she's single so it kips me wondering if she's just playing hard to get or she just doesnt love me. Should I just give up or continue pushing ahead??