Clairsentient, Clairvoyant Confirmation, Developing?

My name is Kate and I am 24 years old and I guess I am writing because I am looking for answers and I don't know where to begin. When I was little I had some experiences of seeing ghosts and angels. I had a near death experience when I was 13 and after that my senses sort of stopped. I was in a 14 hour long surgery for my back and I saw the white light and golden gate which was I guess in a dream but it was so lucid and real I don't know.

However, just recently my senses have been picking back up. When I was in college I went through some substance abusing with alcohol and the summer before my senior year my really good guy friend passed away. He was the first person who was close to me to pass away and I didn't take it well. I was at a party about two weeks later and I hit my head several times and blacked out. Then after that I swear I saw him one night backing out of my garage. Shortly there after it was like I was totally aware of my surroundings and sensing energies and other people's feelings. I also have an undeniable feeling that he has some unfinished business like he needs to tell me something but doesn't know how.

Now after I hit rock bottom I moved home and since I have been home for a year now I have been able to see dark shadows (I'm sick of the shadows) of different colors sometimes, sense when there is an energy present, know how other people are feeling when they don't say anything. It even has affected my job to the point when a guest is upset I get sensitive and want to cry a lot when I hear their frustration.

I guess I want to know how to develop my senses to control them more. I would also like to learn how to see auras and astral project which I know I have because I have suffered from night terrors and sleep paralysis as well. If any body can help me confirm and tell me how I can develop I would appreciate it.