I have nothing to live for?

There are a zillion ways to meet people, but usually meeting the first one is hardest, since one friend will over time introduce you to others, making it easier to meet people. But consider joining a gym, getting involved in the arts, joining an environmental group, volunteering at an animal shelter, getting active in a political party, playing basketball by yourself in a busy neighborhood, joining a hiking club, joining a bike club, getting a job where people your age work, taking a college class (even if you're not going to college, you can take a class), even looking up church singles groups. For most of those things, you can easily find what's available in your areas by using Google (e.g., bike club name-of-your-town). It sounds to me like you're still very depressed at the death of your father, but the best way to honor him to make his life an inspiration not a loss. Since you were diagnosed with social phobia, you probably also know that the way to move ahead is to take very small steps one day at a time.