Sorry to tell you, but luck is always the weak's player excuse.
Even if you do have bad luck (which I can not believe you have for 6 monthes - a few weeks maybe but not 6 months) there is nothing you can do about it. What you can do is improve your game.
You claim you are tight agressive, but from your post I think you are playing tight passive. The rest of the players know that and use that.
Play much more agressively.
For one session play raise or fold only.
Bluff a bit more - I bet you almost do not bluff.
You have to make the other players respect and fear you more