HOW, unless your apartment makes it ridiculously expensive to have one or your parents forbid you, do you not have a pet?
They are so loving. They are so friendly. They are so caring. They are so concerned.
They smile. They snuggle. They ignore you. They laugh at you (you know they do). They kiss you.
If you don't have one, you need one. Adopt an instant best friend, it's pretty cool!