Picture this: You've finally decided to take that Caribbean cruise you've been dreaming about. You're scrolling through prices, everything looks perfect, and then you see it, a line item called "single supplement" that doubles your cabin cost. Just like that, your affordable getaway becomes a luxury splurge you didn't budget for. If you've ever felt penalized for traveling solo, you're not imagining it. Most cruise lines treat single travelers like an inconvenience, charging