I suffer for like 6 years of dp/dr and I can surely tell you that you won't get crazy. It's just a coping mechanism for your fears and depression unless you have a trauma. If there's no trauma, I guarantee that you will get better either with meds or on your own. Find a way to fight the triggers that cause your dp/dr which are mostly fears. But I guarantee that it's impossible to loose your control, since you know who you are and you respond and you will respond even if you get insanely crazy. The only bad thing you can do is worsen dp and gain more and more fears by feeding them. Nothing else. Trust me, and also believe me, you know who you are. If I show a picture of you and someone else you will surely show me who you are. These are just fears, I know it's a hard way to follow for cure, but you need to accept your condition.