Bravery, or is it?

For the long term of my life i have held on to the belief that bravery is knowing something is so dangerous, but going ahead and doing it anyway.
Guess what? last night i found out it was wrong..
A really close friend finally broke it down to me :

" bravery is doing something when you know its the right thing and you are doing it after you thought about it really well. what you did? it was reckless"

So i have been reckless, all my life actually. Doing something without thinking about it first is and always what i do. Its an urge, i can't help it. But in the process i realized i been a huge burden to a lot of people. Coincidentally those people care about me, making me feel like a huge douche for treating them like that.
so life couldn't be as exciting as i wanted it to be. This is the first time i ever realized i had responsibilities towards other people.
If that sounds so terrible please understand im a loner.

So now im again confused. Where the hell is life taking me this time?