GF or Cigarette

One of the morning when i was driving in my car, i saw a young couple should be from "The One College" they are walking hand in hand, the guy's left hand holding his gf but the right hand is holding a cigarette, is kind of funny, maybe he want to use the smoke to blow his gf mind. I wonder which relationship will last till the end, the left hand's relationship or the right hand's relationship??? I have the answer for him, eventually he will let go his left hand's 1 n continue the relationship with the right hand's choice, the reason why is because this kind of student love doesn't last long.