Recovering COnfidence after bike fall
I am not a doctor, but its sound like you might be suffering Post Traumatic Stress, and should seek professional help to rule it out or get treatment. 

You should be concerned about the 10 critical accidents (I read critical that as hospital/doctors visits and time off school/work, not a mere "off" ). You are likely riding beyond you limits, and need to learn to ride safer - (rein in the testosterone). Accidents happen, but 10 before the age of 20 is to high.  Its a numbers game, and with that many, one day you will not ride another day.  

Have you ever had, and are still getting coaching? This would be my first step. You need to learn why you are pranging and getting hurt, and stop the "getting hurt" bit. Prangs are a part of pushing things when MTBing, getting hurt regularly is not. 

In the end, if you cannot rein it in, switching codes (I presume you are down-hilling/freestyling with those stats) to XC, Cyclocross or Road may be wise.

And do listen to you parents. They don't want you to stop riding, they want you to stop getting hurt. They dread having to arrange a funeral or  remodel the house to suit a paraplegic.