Every Thursday we highlight a problem from a listener. We give our advice and ask other listeners to offer advice. Welcome to the Counseling Corner.

Dear Brain and Courtlin,

I'm having a big 'should I, or shouldn't I?' moment and I need some advice. I've been best friends with my friend Tim since we were kids. I don't even like to say we're friends because we're more like brothers. Anyways, he started dating this girl a little over a year ago, and I'm not her biggest fan. We've all spent time together, and I've tried to get to know her more, but I just don't really like her. She's very manipulative and controlling when it comes to her relationship with Tim, and she has kind of a stuck-up attitude. Tim is the complete opposite. He's very laid back and the nicest guy you'll ever meet. I've never said anything to Tim about it, because I don't want to make things awkward, but he recently told me he's thinking about proposing. As his best friend, part of me wants to be honest with him and tell him that I think it's a bad idea and that I can't see him with this girl for the rest of his life, but I really don't want to cause any problems. Is it my place to tell my best friend that I think he's making a mistake? Or should I just keep my mouth shut? I'll support him no matter what, I would just hate for him to make a mistake that could potentially be avoided. What should I do?