I don't understand what you mean by sharing feelings. I can share thoughts with people I'm close to, but in general I don't think I have a need to.
I don't think I really have "feelings" about many things though. Any emotion that comes up is usually a side-effect of my environment or situation, and I can usually only notice emotion when it is intense and overwhelming. So in a negative situation, it's in my nature to recognize these intense negative emotions (since I view them as irrational), let my thinking side take over to understand why I'm experiencing these emotions, and think about how to resolve the situation.
That's why I can't remember the last time I had an emotional angry outburst. I also don't remember the last time I had an emotional happy outburst.