Similar to what others have said, I tend to be much more spontaneously helpful and giving of myself when I'm happy and confident. When I have low self esteem, I am uber-focused on that fact, so am completely self-absorbed. There is little to give, and I'm very selfish in trying to maintain and carve out my own needs - although at the same time am uncertain so don't have much backbone when it comes to saying no or asserting myself and my own views. It's a weird conflicting state. I suppose it's a sort of resentment - the act of giving, when I myself am not happy or solid.