actually chocolates makes you happy! It is not the chocoalte that is unhealthy it is just the amount of sugar that some version have that make them unhappy so just make sure to pick the most healthy version of it.
I don’t really believe in the word “unhealthy” everything is going to be unhealthy if you eat it a lot, even a lettuce.. so chocolate is not really unhealthy if you eat it every once in a while, it’s gonna be unhealthy if you eat it everyday!