I've found that being stressed out is somewhat of a choice. Once I realized that, and believed it, it has been much, much, easier to rid myself of stress and not be negatively affected by most stressful situations. Now, this may not work for everyone; it depends on your character a bit. But go ahead and give it a try. Funny thing is, I get about the same amount of sleep on average (sometimes less), and I don't find feel like I want to talk to people any less... Maybe that's just me...?
Also, here's something that could help you a lot in this situation; join some activity, team, event, or something that forces you to meet your peers. Just a few years ago, I wasn't very outgoing, and I was very quiet, kind of a stay-in-the-shadows kind of guy. Now, three years later, after being on a FIRST Robotics FRC team for that long, I have been changed tremendously. I have no trouble talking to people, doing crazy things in public, making eye contact (to the point where it becomes uncomfortable for the other party, even), etc, etc...
I may be a bit of an extreme case, and you might not be affected as much as I was, but it'll still help, trust me. Just make sure it's something you will enjoy doing; not simply because you might get bored otherwise, but also because the people you meet will most likely share some of your interests.
I hope this helps and that you can make some nice friends! Good luck! Don't do drugs!