Does anyone here have tips on not failing the recovery?
I mean, a lot of people stop their addictions, but start over again, it's a sad thing, do you guys can help on this?

When this happen it really only goes to show that they did not resolve underlying issues that caused the addiction to begin with. They also might have went through recovery for the wrong reasons. I think in order not to fail in the recovery process you have to be strong, say no and really want to recover to the point that you make yourself not do it even if you want to. Take yourself away from any situation that might cause you to return to the addiction. Whatever actions must be taken, even if it includes closing doors on friends or moving to another place to start over.

it is pretty hard to not have a comeback, and it happens a lot, but all you have to do is keep on trying and looking for help, that will be achieved one day and you'll feel great, we should never give up!

Keep reminding yourself that you sobered up why throw away all the effort you put, and all those hard times you went through? why go back to being an addict again? just keep reminding your self! right it down on a peice of paper over and over again why you shoudn't