Breaking off a casual arrangement can be tricky, especially when emotions aren't clearly defined. I’ve been in this situation before, and the key is to be honest without overcomplicating things. Start by acknowledging the fun you’ve had, but make it clear you’re looking for something different now—whether that’s more space, a shift toward friendship, or just moving on. Avoid ghosting; it leaves the other person confused and frustrated.
Timing matters too. Don’t drop it right after being intimate or during a stressful moment for them. A simple, 'Hey, I’ve really enjoyed our time together, but I think I need to step back from this dynamic' works. If they press for reasons, keep it vague unless you’re comfortable sharing more. The goal is respect, not negotiation. Some friendships survive this; others don’t, and that’s okay.