Why does my personality change so drastically around my parents?

If you asked any of my friends they'd tell you I'm the sweetest, most gentle person you'd meet. I pride myself in the way I treat others and I'm proud of the individual I'm becoming... But why is it that when I'm around my parents all I feel is anger and frustration? Sometimes simply looking at them makes me annoyed. I lash out and yell; the littlest things will make me cry when they're around.

I have never had a good relationship with them, it's terrible actually. They were never good parents to me and did not treat me very well at all growing up. I can't remember being an age where I didn't hold some type of resentment towards them.

I just don't understand... They try to be nice now and they've done a lot of good things for me too, but I just absolutely cannot be around them, my entire personality changes and I don't know why...
Why does my personality change so drastically around my parents?
Post Opinion