These two words look similar, but they mean different things.

Sensible = vernünftig
„She made a sensible decision.“

Sensitive = empfindlich, sensibel or einfühlsam, depending on the context.
„He’s very sensitive to criticism.“
„She’s sensitive to other people’s feelings.“

💡 Quick tip:
A sensible decision is a practical, reasonable decision.
A sensitive person may be easily affected by things or particularly aware of other people’s feelings.