[3~Libras]

I am surprised to see that no one has pointed out the obvious answer to your problem. You have problably not played a significant amount of live poker to realize that you might have only run into some short term luck there. From the way it sounds, you just do not have enough skill to be a consistent winner at the 1/2 level. If you can not beat this level consistently online, you must be doing something wrong- that's all there is to it.