As the title says since i bought this game, i can never play online, always gives some error, this is making me very sad, cause sometimes i dont have anyone to play and its horrible to play alone.

Can anyone help me plz?

error when you try to join someone? or error when you try to sign into LBP servers?

if it's when you try to join someone, I found a very helpful tip ( although no one believes it until they try it a few times ).
If you clear your costume and tell the people that you are trying to join to clear their costume, it makes it a whole lot easier to join someone. I hope this tip is useful.

Everytime i try to join someone, it says the person refuses, or if the person sends me an inviite to join, says failed to enter the game.

I cant play online in any way, but i conect to lbp servers with no probs

well.. the costume thing really helps a lot.

as for the " refuses to let you join ", that means that they pressed the circle button and didn't want you to join.