How do you get a social life?

[hello!]

Hello!
I just wanted to ask for some advice, and I'm asking you to please read through the background to my issue here thoroughly, and if you're just out to get some points, leave.
I'm asking everybody to please not give me any rude answer, or something that doesn't help at all (e.g "just be confident or be yourself idk..."). That is not gonna help me, so if you wanna troll around on Yahoo! Answers, find a troll question and troll that one, I'm asking you nicely to not do it on this one.
Thanks!

Anyways, a little background. I used to live in a really small town in the middle of nowhere. I never really liked it, since that kind of environment is boring and not stimulating/motivating enough (IN MY OPINION!). It was really shitty to be honest, yet I survived there for almost 16 years.
Here's how I would describe my social life there: 3 or 4 friends, boring, not a single person to text or hang around with on my free time, nobody really cared about me, I was the "uninteresting" and perhaps "weird kid". This has a little bit to do with my experiences there, and frankly, the people were NOT nice there. This held me back so I never really had a real social life. I had no social life, so I can impossibly have any experience in this area.

Things have started changing however. I moved to a bigger city, and I immediately noticed that the mentality of people here is a lot different. In my new school (let's just call it my country's equivalent of your American high schools) there are plenty of nice people. They're not so "hostile", like they were in some way in that rural place I lived in. I definitely talk more to people, and I generally like living here better.

My problem is though, I don't know what to do next. The school started in August, but I have no "REAL" friends (although I do talk, that's not the problem). Since I have little to no social experience, I'm just "stuck" :/
How can I develop relations with people in a very smooth way, without being weird? How can I get to know some folks better? Perhaps make some friends that you can hang around with on free time?
In my new school, sometimes I'm still alone at the breaks. I still have NOBODY for my free time or even texting on the phone! What is next?

Also, I would like some tips on socializing with the opposite gender. I used to have bad confidence around girls, and basically in general too, but I think my confidence has improved slightly. Since I moved here, I care less about what people think.
But I just don't know how you can approach 3 or more girls from the class without being "weird" (I mean C'mon, we've never really talked a whole lot on breaks!). What is the secret to this?
Someone would say confidence, but fuck, you DO come off as weird if you start talking about something completely random with girls you've barely socialized with!

Final questions, I'm asking these regarding Facebook.
It wasn't long ago I didn't even had a Facebook (what would be the point, I was an isolated loner!). Can you perhaps socialize over this (BESIDES liking each others pictures)? And is it "weird" to have 54 friends on Facebook? I freaking don't know anyone here, and that's kind of a disadvantage. I have no connections to people because I just moved here. Adding people from school would be weird as hell if we hadn't socialized at least once.

That's basically it. If you want to know, I'm 16 and a guy. Sorry if I come across as negative, I really am not. There are problems in my life I wanna tweak, but I look forward to a bright future and the move to this city has really improved my general mood!

Thanks!