it is simple,first u should be concern about the history of player,is he a loose before the flop?u should know what type of player u are playing with and believe me sometimes it is hard,cause they just play with aces and when they double up,they are gone.but anyway u should know what kind of player u are dealing with,is he loose or tight,before or after the flop.then play your cards again that person,poker most of it(all of it),is a game of people .
i did not say u play bad or anything,i mean when he is a bad player and u bet on the flop and on the turn,and there is no flush out there or any kind of draw,u should think what he has?it is much more important you know what your oponent has,u could not play poker blind and hope your hand is stands up at the end.
and the final point is in low stakes,alot of not nececary bad pepole play implied odds before the flop and pot odds after the flop,to think that way sometimes it make sense .
if u play good solid poker,u are winner at the end,it was just a hand,a lot of much imposible things happend in my poker history,good luck anyway.