Humans have needs, and when someone else (your teen, parent, partner, friend, colleague) expresses their needs, it doesn't mean you are doing anything wrong. It just means they have needs.
The fourth agreement is an invitation to keep going and keep growing. Each of the previous agreements requires significant awareness, effort, and unlearning of old patterns, and the fourth agreement, the commitment to doing our best, is the glue that helps us stick to these new beliefs.
The second agreement invites us to acknowledge that we are all working through the perspective of our own unique experiences.
The first agreement invites us to speak with love and kindness to and about ourselves and others; in other words, we are called to align our words with the ultimate truth-- love.