Save time:
The crux of this discussion is time. Basically, you'll be saving a lot of time. Time you can judiciously spend on a wide range of activities. Time which you can put to use at your own discretion.
You'll not be bound by having to spend time with her even when you'd have wanted otherwise.
stuff :
When you don't have a girlfriend, you can channelize your focus towards other fundamental issues in life.
-Study
-Read a book
-Work out
-Play a sport
-Learn to play an instrument
-Inter-personal relationships
There's so much to do and so little time. Afterall, YOLO!
Not obliged to do favors:
You won't have to do odd or rather petty favors for her.
For instance, you won't have to
Live freestyle:
You are free to live life the way you want.
Spend more time with friends and family:
Make memories and lasting friends.
Spend time with your wingies and other college buddies.
Talk. Play sports together.
Also, you get to talk more often to your family people.
Stable life where you can think logically. :)