Mostly we are ashamed for sticking around for someone who makes us feel like we can't trust and we shouldn't love.
It's a really sad thing, becoming less naive. The saddest necessary change you'll ever make in your whole life. Naiveté means trusting. And what does that really mean- when you tell someone, anyone really- that you trust them? Mostly it means, I trust you not to hurt me. We give up a piece of ourselves in the naive hope that they wouldn't accept it if they didn't think they could take care of it. But we need all our pieces to be whole - every single one - just like humanity's humblest or most sophisticated tools. In that, all animals and things are nearly equal. A machine falls apart without all its pieces. And so it is. When we give up a piece of ourselves, we become vulnerable. We achieve nothing but the potential to fall apart. And the more pieces we give up, the more fragile we become.
Or we can restructure, reform. We learn to function without the pieces we've lost. The first piece to go, of course, is our naiveté. It's our willingness to trust, and the ease at which we love.
And isn't that a shame.