Question on Online casinos

Hi, guys. I'm playing casinos always, especially blackjack. I can do well in play for fun. But once playing with real money, I just can't stop losing!!!(lose almost 7-8 out of 10 everytime) Does it mean that casino is cheating? Also, there are some softwares say they may analysis and help you to decide when to hit or stand, does that really work????? (be honest, I don't know how are they able to do that)
suggestions? [img]/images/graemlins/confused.gif[/img]