It's pretty hard to suggest anything to you since it doesn't seem you do much interaction and I don't know your full situation.
Interacting with others is a tough thing, especially with anyone who does have social anxiety. The thing is, you have to face it. I absolutely start cracking under pressure when addressing an audience or any person I barely know. I absolutely hate it. But, I know the only way I can get better at it is dealing with others.
True, humans are rude sometimes (more rude on the internet due to the lack of face to face contact. I could say I hate everyone here but I wouldn't be able to say it straight in their face). But, humans are also kind. There are people out there who are social enough to invite people into social situations. You may hate them for doing that, but in my experiences I feel better being pushed in than reclining and sulking.
For what I can gather, I would recommend you do seek a therapist. A therapist would definitely get you started on getting more social interaction. If anything, they'll have to be somewhat of a good start on how people work. They can also prescribe you some medication if necessary. If things should improve or if you do start to actively meet with a therapist, I suggest you possibly consider going to school. It's probably out of your social norm, but it's the best way to meet people your age. If school doesn't fit your criteria or it's not "easy" enough (trust me, it's the easiest), try to find someone your age in the family or not. If not, talk to your adults. I absolutely dislike my mom, but we sometimes get on the right foot and actually have some fun conversations.
One last idea, if you're old enough to do this. Perhaps get a part time job. Child labor laws don't really apply at 16 and 17, so you could at least interact with some coworkers from time to time.
If you aren't open enough to try this stuff, I can only say is to stay on the computer and make friends on that. At least the internet allows you to find people with similar interests. Maybe you can meet up with someone from online. Though you probably shouldn't, since the internet is full of liars and rapists. If anything, talk to some forumers on Skype if you want to. But you're not going to get far if you're not willing to crawl out of your comfort zone.
