Oy, I hear you.
I moved out on my own. And it's terrifying. Sure, some days it can be nice. (Mostly in the summer it was nice) But It's so quite and it's just me and my kitty. My boyfriend visits/stays frequently. But still, I'm usually the one left eating alone, cleaning... and it just gets super lonely. One time I woke up, and was asking my dad what's for dinner. Then it hit me. I'm twenty three. I live alone, I'm going to have to make my own dinner.
Recently, I've been bad, and I spent like two weeks at the boyfriends house. I do this when my place gets too overwhelming/I don't feel great.
Anyways, I agree with others. My cat is super cuddly, so I hang out with her. I frequently invite friends over, My parents work/live not too far away from me. So, I invite them for dinner. Same goes for the boyfriend. I go out, explore. Go to a bookstore, cafe. Little shops.
Also, I'm a total window shopper, which makes internet shopping even more fun. And if I can afford it, I totally buy something. Look at interesting websites. Talk to friends. Text/IMing. Wiki or Youtube Role! (You look something up, then you follow the video it advises next/read whatever it links you to).
Sometimes, I throw myself a "Date". I make myself a nice meal. I pick a movie/show
I want to watch. Take a bath. Read, draw. (play video games) Do whatever
I want to do. Basically, "me time".