•If someone likes you but you don't like them, avoid sitting next to them, making eye contact, and don't respond to them when they talk to you. They'll eventually get the message and fuck off.

•If someone doesn't like you, ask to borrow their pencil. It's a cool psychological trick that will make them like you more.

•Do random nice things for people, like help them on a hard question, pick up things they dropped or hold the door open for them.

•Try to be the funny one in class, and don't be afraid to be sassy. Everyone likes a comedian!

•There's a fine line between being sassy and being a douche.

•If someone you don't like sits next to you, inch your stuff closer to their working space and glare at them if they try to move it, then hope they get the message and change seats.