Manipulative/ Angry?

I've noticed that over the past few months I've become very manipulative, attention seeking, angry, almost as if I'm also trying to find something to be angry about.

Nothing appears to be going wrong in my life, but I'm very much starting to hate myself for what I'm becoming.

I now cry and get very angry when I don't get what I want, never want to be alone, push certain people over in an attempt to make them as crap as I feel and even getting physically angry and scratching/ throwing things. Not nice at all.

Anyone experienced this or no the cause of their 'odd' behavior.

I'm always wanting to improve on myself and I really do not want to become a bitter person.

What do you do when you're stressed or angry?

Any advice/ experiences?