Alot of times when I try to tell someone something, at a time when I'mreally trying to express myself, I feel like I'm being needy, or have an extreme feeling of insecurity, like I should be saying what I'm saying. Why? what could cause this? what do I do about it?
You're supposed to feel exposed. Maybe you're just confused about what your feeling is called? Being needy is just like being exposed, but it's a particular type of exposure. Being exposed is like when someone reads what you've written or sees you drawing. In both cases we're worried about what the other person thinks.
It doesn't matter though. In those moments is much better to be truthful and simply accept it, like when you're caught in a lie.