Is it wrong to date someone 5 years older than you?

Of course it is! Most couples are not of the same age, and usually the boys are the older ones. It also depends on the age gap and maturity level. If you are 23 years old and he is 40, it's a definite no-no. Let's say he is just a few years older than you, let's say 26 for this instance, but he thinks and acts like a 19-year-old. Seriously, such people are not that worth a second thought. But my conclusion is that as long as you both love each other, it is fine :) Good luck!