If you ever get to a place in your life where you feel like something is missing, it's probably a connection problem: you are disconnected from God and too connected to the world. Prayer and fasting can have a powerful impact on setting your life back on track.
Prayer connects us to God.
The more time you spend with something or someone, the more confidence you build in it. The same is true for God. The more time you spend with God, the more your faith in Him will grow.