You can be unhappy if you want to be. It is the easiest thing in the world to accomplish. Just go around telling yourself that things aren't going well, that nothing is satisfactory, and repeat that to other people, explain how bad things are. Then you can be quite sure of being unhappy. Or you say to yourself "Things are going nicely. Life is good. I choose happiness." You can make up your mind to be quite certain of having your choice.