Sorry I forgot to respond to the chemical comment. I am on an anti-depressant primarily because therapy without it wasn't enough for me. I am not sure I believe in the chemical idea. I think you could give it a try if you want to. I do suspect some of mine is biological or chemical.
What was the quote on attachment and object constancy? I have a tendency to not feel loved a lot and would like to learn more about the idea of emotional object constancy.