Expired Chocolates are safe to eat and should not make you sick although when chocolate expires it doesn't taste as good as it did when fresh.
Expired Chocolates can also taste rancid and lose it's texture but it's safe to eat expired chocolate if you want too although it may not be as enjoyable if the chocolate were fresh.
If I have expired Chocolate I will save it and use it for cooking with instead of eating directly because I don't like eating chocolate that has expired without cooking it with something.