It might be mitigated by the abuse... if might also be part of you current stage in life. I'm not really sure.
I know I have difficulty doing the whole "adult" thing. I'm nearly 40, and very much resent having to still be the one taking care of me. There are still things I don't do well... on the flip side, I've realized I can't skip out on adulting. It's taken me almost 25 years, but I'm figuring out how to take responsibility for my life. While I was the adult much of the time growing up, as soon as I had any latitude at all to drop those responsibilities, I dropped them. I got myself into financial trouble (though work has always been my escape, so I've always worked), I've ignored the rules about "healthy living"... I'm in a relationship now, but they had been something I didn't desire for a long time.

I think at least for myself, different than what amandalouise had said, I was tired of having to be responsible for myself and others. From before I could walk, my role in life had been to care for others emotionally and physically. My presence was expected to keep my mom safe from my dad's abuse, I was a stand-in husband for my mom emotionally, and a stand-in wife for my dad physically. I was expected to be a smaller version of am adult at all times. Emotions, outbursts, excessive energy, making mistakes, crying after being physically hurt, being ill, having regular, child needs... these were all unacceptable. I was to carry on as if nothing was wrong at all times.
I continued that mode for a long time, but after moving away from home, that ability to carry everything started to crumble. I went from being able to do everything I was supposed to do as a young adult, to suddenly not being able even to clean the house or cook meals. I did the bare minimum to stay alive and keep my critters safe and fed. Beyond that, I stopped checking mail, answering the phone, doing anything that I didn't think was fun enough to warrant doing...

I'm chalking it all up to a learning curve. The stuff I had learned to do to survive in my childhood had to be unlearned. Some things were easier to do than others. There's still a lot of stuff I'm un-learning,and others I'm just now relearning to do in healthy ways.

Perhaps this is something that might be addressed in therapy for you?