Why is it hard for you to make friends?

Hello, I’ll get to the point because this really makes me feel bad to the point of crying inconsolably...

Today was my first day at university and I tried to wear my best face and appearance to please people, but it just seems that people avoid me. Today everyone absolutely ALL in my classroom ended the day already with their groups of classmates except me...

The same thing has happened to me since kindergarten, when I try to talk to someone they answer me in a “strange” way or simply show no interest in me, just like today. I really want to know why people act that way with me despite making my attempt to integrate myself.

Today before going I was really excited, but now I don’t want to go back and always be alone again.

Please tell me if you share any similar experience and advice. I really need it to be able to change the way I relate to people.