There's no doubt Booth had a huge impact on Brennan's life...even though Brennan had been good friends with Angela long before she met Booth, but I think it was really Booth who was by far the biggest influence in her life. And because of Brennan's relationship with Booth and his profound influence on her life, Brennan started to see the world differently and he was the one who really broke down those walls around her and really brought her out of her shell. Booth was Brennan's rock and she became a different and better person mainly because of him
