CA, Good luck!
To be honest, I think that they will be relieved and that you will certainly be relieved! I'm sure that they are worried for you. They may be thinking that you are depressed for no reason, gay, or using drugs or alcohol and will be relieved to know what the deal is and that you are working on yourself. Your parents sound like very good people and non judgmental.
It's really weird but I don't know you but I really feel for you and sincerely hope that it works out for the best. I would also like you to know that I had similar problems when I was a teen (procrastination) and I got over it!
Keep us posted, will think of you during mincha