Because of that she had never had enough energy to be...

Because of that she had never had enough energy to be herself, a person who, like everyone else in the world, needed other people in order to be happy. But other people were so difficult. They reacted in unpredictable ways, they surrounded themselves with defensive walls, they behaved just as she did, pretending they didn't care about anything. When someone more open to life appeared, they either rejected them outright or made them suffer, consigning them to being inferior, ingenuous.