Have you ever felt like you're done being nice?

I am. I am SO done. This girl I've been doing favors for ended up treating me like crap and lying to me. I flat out told her I'm done being nice. I said, "After all I've done for you and this is now you repay me? You're no friend. All this time you have been trying to take my kindness for granted and you didn't even appreciate what I have done for you. For now on, do NOT ask me for favors anymore because you end up taking advantage. I have been so stupid! You keep saying "sorry" but you never mean it so no, you're NOT sorry! I don't wanna hear it anymore! I am done being nice. You're on your own! And I walked off. She said, "Now you made me feel bad." And I told her, "Well you should! I hope you're happy about what you did!" And walked off. Sorry I had to be blunt but it needed to be said.