Unhappy

I am beginning to think that I suck at a being a person.
I am frustrated living here, I have no problem with my work and work is pretty fine.
But I don't have any friends. My colleagues are super unfriendly, they only speak french and mingle among themselves. If they tell a joke, and all of them are laughing, they don't bother to tell us. If there is something going on, bad or good, everything is hush hush. That includes my boss as well. Everyday, I go to work, do my work and sit at my desk. I buy lunch and have it at my desk. The only friendly person I have encountered is the lady at the cafeteria who sells me my food. This is beginning to get to me. I feel unhappy to be in this state. Then I go to french class. Everyone is friendly and all, at least in class. But most of them have cliques and other friends. I never get invited out for drinks or anything basically. Today, the girl I thought who could be my friend, said she hated me and called me a bitch. I don't even know whether she was joking and she meant it. Seriously. there must be something wrong with me. I know I am an introvert and most of the time I don't mind being alone. But this is too much and before this place I have had people to be friends with (who still are my friends), people who loved me (still loves me). This place is sucking my happiness away from me. I used to smile a lot, even when I am sad. Now, sometimes I can't even bring myself to smile anymore. I tell myself, I am strong, I am okay, I am doing just fine, to lift my head up and walk proudly because I am perfect in the way I am, Then I cry while walking home (alone).