You are already killing yourself..... All women are beautiful, just some more than others...
Don't think you can walk out there and get a HB10, then you never will.
So the above is all fine and dandy but doesn't give a specific direction to increasing your inner game.
Start small. Reflect on your life and the women in the past and assign a starting point.
Last girlfriend was a HB4? HB5? UG2?
Determine your starting point and one up it. You know you can get your starting point. You have been there in the past. Work on getting the next level. After you have achieved your next level, go up one more.
Eventually your game will be as sharp as a knife edge and you will have the confidence to have any girl. Why, because you have already achieved it.