I want friends

I don't know if I'm in the right group for this, but I think I lack so much social skills and study habits it's just sad at this point. I am F18 and went to first year university this past September. When it started, I struggled talking to people and figured as long as I keep trying friends will come, they didn't. This wasn't even a friend's come and go kind of thing, I probably spent less than 10 minutes actually talking to people from my university... I don't think I'm a bad person, Im not rude and not fake, I just can't seem to find where or how to find friends. At the dining hall the first 2 weeks I shot my shot when I say people sitting alone -way out of my comfort zone-, and we had a solid nice time, exchanged instagrams but never spoke again. Now I see them on their stories with all their friends and feel lonely. I have about 3 friends I still keep in contact with from highschool and one just invited me to spend the weekend for Saint Patty's, I see how she's friends with her whole residence building and genuinely I want that from the depths of my soul. I don't know how to do it, I try smiling and nodding when I walk past people, the people I know I ask how they're doing when I pass them in the hallway, but at the end of the day I probably spend 23 of my 24 hours -on weekends without class- in my dorm playing Roblox, I don't wanna go out and just be alone. I don't know why, I feel like my personality is bland and just soaks up things from other people, but I don't know if that's the cajse or how I should make my personality more interesting... I also have no motivation anymore, I'm not depressed and sad but I can never get myself to go to the gym, study or anything like that... I want to but Im just a loser who sits on my dorm all day. I feel like people are gonna go out and say I should leave my dorm to go make friends with people, I tried... During the critical two weeks I tried. I stepped way out of my comfort zone at the cafeteria and tried, I tried talking to people in my classes and nothing stuck.