Hang in there. College isn’t high school. Two weeks isn’t long enough to call yourself friendless. You have plenty of time to make friends. These early friend groups are going to morph and change constantly, and a lot of those people will not hang out with each other later in the year.
MANY roommates don’t click with each other. You coexist if needed. But you nip unacceptable behavior in the bud. Just say nicely “hey, I would rather people who visit you don’t sit on my bed.” If it persists, that’s what the RA is for.
Be glad you can’t go home at weekends. It’s been shown that students who go home at weekends don’t do as well as those who stay on campus. Please read this whole thread: http://talk.collegeconfidential.com/college-life/2016222-to-those-who-feel-lonely-homesick-friendless-think-they-chose-the-wrong-school-etc-p1.html
I promise things will get better. Start volunteering. Get a campus job. Both are great ways of meeting people. Don’t hide though. And read the pinned post by @bopper at the top of the page on ways to meet people.