How do you make friends?

Man University feels really robotic people just come into the classroom and leave. I tried to make conversations but its like chit chat and a dead end. I am introverted so i don't really know how to follow up. I am an international student i do want to know people and the culture. I don't want to make anyone uncomfortable so after a introductory hi hello i just feel blank. Like in high school it was easy to make friends. Now i don't know. I don't know if anyone else feels like this or is it just me. I just want to sit down and have a conversation about life.