I had to be strong without you, because you were my strength and you left me. I was strong right after you left, but I grew weaker and weaker without you. You kept hurting me and tearing me down after you left.
This metaphor perfectly nails the way children are so eager to believe the lies of alienating parents. They miss their absent parent, giving the alienator the perfect opportunity to feed them full of lies to fill the void, and the child eventually begins