Trying to fit in

I’m a late 20 year, moved to a new country. I am very anxious about everything. This new college I go to is full of well dressed, good looking and super smart people. And I am the total opposite of it...I have a hard time making friends and I feel really lonely. I feel like I don’t belong here. I know some people but they seem to hang out together. Greeting them in the morning feels like I am the only one making an effort to smile and say hello. Usually I have to say it 2 or 3 times to get people to look acknowledge me. I feel like I am invisible. I do other things to distract me, but I miss out on parties and hangouts even though I am not into partying but I feel lost and excluded. I don’t feel like I am me anymore. I think people see me an uptight backward person. I don’t feel happy, I don’t even know if everyone goes through it the way I do.