Being truly happy is an achievable state of mind. One only needs to be guided and the rest is up to the individual to put into practice. Being truly happy does not only have positive effects on the body but it also effects the condition of the mind.
Generally people like being around other happy people, thus when one is constantly sad or down there is a very real possibility that the percentage of people willing to be around are almost nil.
You can choose to be permanently grumpy or you can choose to cheer up and smile! Have you been putting off the smiles? By smiling you will be releasing endorphins in your brain which will make you feel better.