Best way imo for you to stop being pathetic, limit yourself to internet access. It means you will have more spare time to do other things. Pick up a sport/hobby, learn to do something for the sake of learning it. Me myself, I plan on learning some blacksmithing because i have always been interested. At a certain point if you stick with something, you could be like "hey i know how to make X". If you shut yourself in, you cant be a social butterfly if you are locked in a cage.
Having hobbies/interests that go against the majority of people is a bad idea, when was the last time you heard of a child enthusiast or a murderer being the most popular person in town. As cliche as this is, it is smart to fit in, i dont mean changing who you are, just dont tell everyone the whole story about you.
Most obvious advice ever: Just act casual and talk to someone. If you sit there worrying about it and getting nervous, you wont make a positive impression.