I'm Meaner

So... one question I've been thinking about is how my semester abroad changed me. Sure... I learned how to be independent. I learned how to clean things and cook pretty well. I learned how to be on my own. I learned how to sit in silence. 

But... there was something else that happened. I didn't notice it when I was abroad, but I have been slowly picking up on it when I got back home. I realized that I was meaner. Now... by that... I don't mean cruel. I mean I refuse to let people walk all over me. I take what is rightfully mine and don't regret it. I put myself first, when surrounded by people who do the same. I used to do everything people wanted me to, believing that I would get recognition for it. Now, I wasn't timid, but I guess I might be called a pushover sometimes. I wouldn't really fight for things, preferring to choose peace. But now... I can't seem to do that. I try to do that. I try to stay calm, but I rage. 

My question is, is what I'm doing mean, or is it taking care of myself in a world where people only look out for themselves? (and their loved ones)