Striking Realization

I just had a terrible realization...I'm lonely. I've been back in the States now for almost four weeks and I'm lonely. In Copan I was surrounded by friends day and night and interacted with hundreds of people every day (albeit the majority under age 12).:) Since coming back to my parents place my life has seemed fairly flat and lacking something and I couldn't place a finger on it...Then sitting here in bed tonight it struck me like an epiphany (learned that word in church...), I'm lonely!
There's no real blame to go around on this issue, I haven't sought out friendships around here as I view the Seattle are as a very temporary place to be...so who needs close friends here? Now, no offense in the least bit to my parents (sorry to say this mom), but when I spend the majority of my time alone at home or with my parents at home my social life feels like a vacuum...only I'm the only one hanging out inside the vacuum bag. I need to get out there and make friends my age around here...that's scary...how do you even do that? I don't even remember what it's like here in the States to try and make friends outside of school. Don't all the people my age just go dancing and get drunk? I don't even know what people do around here for fun? Do lots of people in their twenties think cards are one of the greatest inventions ever or is it just me? Do lots of people my age prefer to just stay home and chill with a few friends on the weekend instead of "hit the town?" Do lots of people enjoy sitting and people watching? What if I'm hanging out with somebody and I have nothing to say? Are people ok with that around here? I don't know if I've ever had a bigger feeling of seclusion...I guess I do take after my dad on the extrovert scale more than I thought.