Hello Fairy Tooth, I am sorry you are feeling this way. You sound like me, before I was as depressed as I am now. I understand what you are going through.

"It" is your personality. While it can be said that everyone is an individual and is different from another, our personality is the "core" of our being and fits into specific categories. It is the reason why there is order in this world, and sometimes, chaos. It is the very thing that may hinder or boost our communication between each other.

Now, you are a Peaceful Phlegmatic human. The legend goes that these humans have too much phlegm in their throats, preventing them from speaking. You are a follower, quiet, shy, a people pleaser, a jack of all trades, master of none. The reason I can tell this is because you say:

"It depresses me a lot that I can't express how I feel toward certain people or form friendships with them."

That is the goal of the Phlegmatic. You want to be friends with everybody. When you cannot achieve this goal, you become depressed. That is the reason why I am still depressed today. I have been depressed most of my life. I am sorry but I still have not found a solution for this problem. I still have more information about it, though, if you want to hear it. Will you please let me know?