Draw near to God, and he will draw near to you. To me, this is the same as developing a friendship with someone in your class room. Over time you talk to them, spend time with them, and get to know them.
Sure, we cannot see God. And you may feel silly talking out loud. Well, begin by talking to him in your mind. This is really what praying is about. Talk to God like he is your friend in the classroom. Tell him what worries you. Tell him what you are excited about. Ask him for his help with all things, big and small. Let him know that you love him.
Draw near to him, and over time, you will begin to see changes in yourself, and in your life. He will draw near to you.