Am I the only person who doesn't get invited to anything, ever?

I am 22, and have a bunch of friends....according to my Facebook profile, I have 248 friends. I never, ever get invited to anything, and I don't even get the courtesy of being invited and declining. It's literally to the point where I go through my entire week, Monday-sunday, and I am so lonely, I just want to go somewhere. Does anyone else have this problem? I'm not some socially awkward loser, and I have many legitimate friends, I'm very friendly and outgoing and helpful, yet somehow, I am just never included.<br><br>I've also had my friends literally, invite everyone in our circle except me to a group event...one night we were all hanging out, and a bunch of my friends were having a cookout the next day, and they invited all of our friends except me. I'm still buddies with them all, but it hurts man....I don't know how I'm supposed to feel....do I move on...are they not friends with me?...I don't even know anymore. It's just so...lonely.