I know I shouldn't

Yea,I knew it...
I knew I shouldn't be that negative-minded...
Yea,I knew it...
I know I shouldn't think that much...
Yea,I knew it...
I know I shouldn't be that hot-tempered...
I knew I shouldn't did all the things above...
But what to do?
Change it?
Tried before...
But then...
Still the same...
I'm not so confident in this,
some people asked me to think positively and be confident,
But sometimes,
confident is not enough...
In addition,
the situation makes me not confident...
Hmmmmm....