"... when you still love someone and they don’t love you ..."

[Odessa Dawn]

English has always used the male pronoun when the sex is unknown or mixed. "Everyone should bring his book."

A few decades ago, some people decided this was "offensive" because it seems to exclude females. So people started using "his or her" or similar expressions.


That was too much trouble, so people have begun to simply use the plural, non-gender specific "their" in these cases.

Now no one is offended except grammar purists!

Coleen says..
This is such a sad situation all round, but at least he’s being honest and civil, and isn’t trying to hurt you.
It’s always very hard when you still love someone and they don’t 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?​

 

[bhaisahab]

Coleen says..
This is such a sad situation all round, but at least he’s being honest and civil, and isn’t trying to hurt you.
It’s always very hard when you still love someone and they don’t 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 simply means a person.

 

[emsr2d2]

It refers back to the "someone" earlier in the sentence, whose gender is unknown.