You have to understand that your will to overcome fear comes from your want to perform the act. You have to want it more than you are afraid of it. It helps to spend some time thinking about what your goals are with skiing and how you might go about achieving them. If your goal is just to have fun on the weekends and spend time with homies, you probably won't end up ripping dub 12 blunts. If your goal is to push yourself to be the best at something you love that you can possibly be, chances are that will manifest itself. Bottom line is, sometimes skiing is do or die for people. Sometimes it's just a hobby that you may or may not find the risk of injury to be worth it. Both are ok, and there's a whole grey area in-between.
If you do want to progress and try things that scare you, break down logically each part of what you are afraid of and tackle it that way. Like if you want to slide a rail, you may be afraid of slipping out or catching tips on your way onto it. Ok... So what can you do about that? Practice your approach on a "dummy" feature. Hit a small jump and practice the motion you would do getting onto a rail. Once you feel more confident, focus on the next thing. You are afraid of slipping back, spend some time working on your centered stance after a good solid pop with your knees bent on the dummy feature. These are just a few examples, but ultimately your will to progress and your confidence in yourself are the two things that control fear and overcoming it. It's not magic, it's not something you need a substance to be able to do, it's a mental chess match you can get better at over time.
