I hope that something here might help a little:
Depression is a physical thing. If you feel like a lack of energy or positive outlook is keeping you from interacting with people, it might be a good idea to talk to a doctor. Doesn't need any kind of counseling or a specialist, any general practitioner can talk to you about how you're feeling and prescribe very commonly used drugs that can help elevate your mood.
A dog or cat might be a good idea if your living situation allows it. It's a not a full replacement for people, but they do provide constant contact and stave off loneliness. A dog also makes you get outdoors among people, and actually provides you with a little social group of people you see regularly. If you can't have your own pet, then shelters and rescues always need people to help take care of the animals in their care.