Why people have fears? What's the best way to deal with fears?

You mean like phobia?
Afraid of the water, go swimming. Afraid of the dark, turn off the light. If you are afraid of sharks... stay away from them!

Not at all. I am afraid of making the wrong decisions all the time and after making a decision I am quite sure is right, I still spend lots time worry about the decision that was made will go wrong on me as a result, my life will fall apart. I have no problem making the deciding the decision, but often regret or worry about the consequences it may bring, even-though some of them, I was quite sure was the right one.

Well, if you don't know where you wanna go it doesn't matter wether you turn left or right.
Sounds to me like you need to know the end goal. From there, make the choices based on which choice gets you to where you want to go. It's not always about knowing your options. That may count for nothing if you do not know yourself.

How to get to know yourself?

Make choices and be aware of how they change you.

Actions follow thought - so, what are you thinking about? If you are constantly worrying, how are you making decisions? You are not making decisions because you are thinking already you'll make the wrong decision, so any decision you make is going to be 'wrong.' What you think about you draw to you. We have to plan our lives, start being aware of what you are thinking.

This fear you think you have, you are causing by your negative thoughts. Yes, get to know yourself. Start a journal, write your goals, plans, for the day followed by an affirmation. Fear, actually, is the opposite of love. When you feel fear, think about a time when you were happy, confident, loving something or someone. Try to generate that feeling, not just the thought but feel how you felt during that time, transfer that feeling to a decision you must make. Make a split second decision and move on.

Helps to study books on meditation (controlling your thoughts) or take a class. If you don't know what to do, ask yourself. There is no authority out there, zhjuan. You are your own authority. You are an incredible being and can create your own life, do whatever it is you think about. Write down your goal, then how you will get there, but don't dwell on it.

I am really touched...
Thank You.

You have several threads going here. You're getting good advice. Hope you're feeling better.

You are seeing a therapist for two years now? You are an artist? You know something? People who accomplish much often have tough, difficult childhoods. This stuff is like a dark cloud between you and your true self. Tell it to MOVE, think of something else. Do something you love, something physical like walking, gardening. I played tennis, rode horses, exercised in a gym, taught Yoga. These feelings don't really go away, we just get used to living with them. Ignore the thoughts before they become feelings.

And, yes, laugh at yourself.

Cheers .

Best way to deal with fears is to get it done and over with
Face it and take control
and you'll be satisfied with what you accomplished =D