I face similar problems, like feeling neglected, unwanted, unworthy etc. I often consciously know that what I'm feeling is not the reality, although the negative emotions are quite strong than what I speak to my mind. One reason is maybe, people like us are not collected. That is, we relentlessly collect facts from around us rather than being mindful and collected. Try to concentrate on yourself. It's a matter of practice, but this may help you in keeping the negative thoughts at bay. Good luck.