Yes, I do. I am disgusted with life, I definitely don't understand happiness. Sometimes I get tricked into laughing once or twice, but I still feel sad inside. I think you're onto something when you said "Maybe i'd rather be miserable cause i'm so used to it. i dont know anymore.." I think there is some part of us that clings to it.

Like will19 said, I too wouldn't know how to handle happy, I feel emotionless and dead all the time.

optimize990h - you've got the key down, you have to somehow push through it to stay positive, but that is the problem, at least for me, I feel like there is no point to anything, so why try to be happy? I have no motivation to do anything.