1. You'll always have someone to come home to after a long day.
After a long day on campus of not-so-fun class time and dealing with the stresses of life, coming home to someone who equally hates leaving the house as much as you always makes life easier.
2. You always have a partner in crime
Whether you need a hiking partner (even if you end up getting lost), or someone to go to the local farmers market with, having a roommate always gives you an excuse to go out and do something fun.
3. You can face the horrors of renting a house together
Having to deal with landlords, electricity bills, and, should I say, "unique" house features (such as a can-opener attached to your kitchen wall from the 50's), it helps to have someone else there with you. Or even when someone pounds on your door at 1 AM and scares the living crap out of you, you have someone there to huddle in a corner with and cry.
4. You'll always have someone to pregame with (and you don't even have to leave the comfort of your own home).
Never fear! Your roommate is here, and she has Malibu!
5. ...And if you stay in, you have someone to lounge/be lazy with
Ordering food and eating it in bed might also occur.
6. If you're sick, you have a built in NyQuil supplier
No one likes going to the store when their sick, but luckily for you, you can make your roommate do it for you! Just give em your best moan and cough.
7. You don't have to study alone
Studying for that Physics class is a lot less painful when your roomie is there suffering with you.
8. You can motivate each other to workout
Lets be real, sometimes working out SUCKS. But having a workout partner makes it a lot more bearable.
9. They're there for you when you've had one too many
When you go out with your roommate, you have a built in safety buddy! You know you're both going to end up going home together, so there's no chance of getting lost, or sleeping over at that one guy's house. You also get to slpit Ubers! (Hooray!)
10. You know they have your back
If you're ever in a pickle, you know your roomie is always there to help you out. Forget your house key again? No fear, your Roomie is here!