I find it a constant struggle to prove my sincerity to people; it is very important for me to be sincere, kind, thoughtful to everyone. That's a problem of mine - trying to be a blessing to too many people and ending up being a blessing to none or few. People can take my lack of follow-through to be insincerity, but I'm just out there trying to please a million other people!
I wouldn't say I'm emotionally needy. I only come across like that if I feel the person dislikes me. I will go over the top and be a bit gushy (pretty much just plain gross) and smothering in my attempt to regain that person's love. Hating me is a good way of getting my attention. I wouldn't be needy in the slightest in a normal relationship. If anything, I'd be slightly distant in the (still) constant attempt to get everyone to like me.