Discuss OronD's answer to: I'm a 17 year old girl. I'm always sad? Why am I ...

I hope you are an open person so I won't need to sugarcoat my words.  You went through a trauma.  That trauma explains it all.  All the bad 1 evel things that you do is a direct result of that trauma.  The problem is that what you do now blocks you from being open to a new love and to a change.  The best advise I can give you is get some counselling.   You MUST realize that you have to change.  If you don't change yourself you'll get stuck in your present situation and grow to be a bitter woman, lonely and sad to the rest of your life (G-d forbid).  You must chamnge so you open your heart for a new real trustfull love.  You have to understand that not all men are like your ex-lover.  There are many nice faithful guys out there. 
There is a Chineze saying:  "When the pupil is ready the teacher appears".  Be ready for your new love and it will appear.  But for that you have to change.    When your new (true) love will appear you'll forget that past evet.  Please, don't let your bad past ruin your bright future !.