I've been accused of being a pushover. I know that there can be worse things to be called. However, it made me think - are you really being a pushover when you are telling someone how you feel yet being nice about the situation?
Yes, I've been known to allow people to bully me to get their way even though deep down I don't agree. We all have. I think there is a huge difference between continually doing this compared to being reasonable and kind. Of course the exception would be physical/mental/sexual and any other kind of abuse.
If you always get what you want, then your the bully or mean person. If you're nice and try to be within reason, you are a pushover.
All I know is to stand behind your gut. Treat others you would like to be treated. No one likes a bully - even the bully themselves. Be assertive when necessary but think about the big picture. It's ridiculous to make a fuss over a small problem because you might find yourself standing alone.
Like the Rolling Stones say, "You can't always get what you want, but if you try sometimes - you get what you need."