You gotta check people early. You let one thing slide & people think it’s cool to ice skate. I used to be big on extending people grace but that caused people to play in my face.
Be careful who you build with. Some people will use you for the foundation, then finish the structure with someone else. Pay attention to the signs. Stop allowing people to show you twice what they already showed you once. It's time to start taking care of you and your own needs.