If you are lonelier than you want to be and recognize yourself in any of these descriptions, start with caring for yourself. Perhaps therapy is a good option if you are dealing with a social phobia or depression. It can also help teach coping mechanisms for highly sensitive people. Counseling is also a good option if you have a lot of pain in your past that has left you with low self-esteem.
You can also educate yourself with our eBooks on Anxiety, Depression and Self-Worth.