Student or Learner
This is such a sad situation all round, but at least heís being honest and civil, and isnít trying to hurt you.
Itís always very hard when you still love someone and they donít love you any more.
More: My husband has left but I want him back - Coleen Nolan problem page - Mirror Online
Does they in here represent unknown or mixed sex as you said before?
It refers back to the "someone" earlier in the sentence, whose gender is unknown.
Remember - if you don't use correct capitalisation, punctuation and spacing, anything you write will be incorrect.