Study and gfWatch
Some students prefer to not have a relationship while studying, and some do love having relationships.
You can be successful in studying with or without a gf.
No, of course I'm kidding with sublim girls in TSR
I find having a girlfriend means I need to plan my studies around her. E.g. not depending on hammering out a 3,000-word essay the weekend before it's due because I tend to spend my weekends with her. If I didn't plan my time well that could lead to half-assing assignments.