xiaobaitu,help! If I give up my GC application while 485 pending

Help!!!It is very important for me because I have to make a very hard deccision now to pursue my dream or stay in US. Because my daughter was born in US, I want to come back when she wants to.My friend said if I leave US and get denied later, it will affect my entering US again!Will that be true? My 485 is pending.

Thanks in advance!