If you always feel sad and lonely, the health expert's advice is to eat celery and parsley. Though these veggies are so pricey this time, but celery alone, can be budgeted. You may add it to the meat or fish you like. For parsley, it is all up to you how to cook it, but at home, we prepare it as a salad. This is my secret why I always feel happy. I never missed cooking or adding celery or parsley to my dish.