Well, I can see how people might think that they know you and jump to conclusions, because you ARE really good about sharing your feelings with people. You seem very open to me. So, it surprises me that you feel like your friends don't know you if you share yourself the way you share your feelings here.

About being needy... that's a great goal for therapy. You definitely CAN conquer that one. I think that neediness is 1/2 due to self-esteem, and 1/2 out of habit. A therapist can help with both, and help you find healthy ways to reassure yourself when you would normally seek reassurance from others.

Are you seeing a therapist now? I don't remember, I'm afraid!