Have you ever said “yes” to something you really didn’t want to do — just to avoid awkwardness, guilt or disappointing someone? Maybe it was agreeing to help when your plate was already full. Or going out when you were mentally drained. Or doing something that didn’t feel right, just to “keep the peace.”  If that sounds familiar, you’re not alone.  Many of us — especially teens and young adults — are taught to be agreeable, accommodating and polite. But here’s the truth: “No” is not rude or selfish. It’s a complete sentence — and sometimes, the healthiest one you can say.  Saying No Means Setting Boundaries  Boundaries are not…