I think there are some guys out there who like to think of themselves as "saviour" may be, and so they try with all that is in their power, to help out the girl who is involved in self destructing behaviour who takes the guy for granted or is too busy in messing up with her own life to appreciate any sincerity shown towards her. But let me tell you something. There's ALWAYS a limit. No matter what the guy says ,he will (any normal person will) get tired of her mind games and drama.

If you love him, let him know about it...