So the kid is sad that her parents don't live together and she misses the other one living in her family home. Shocker.
I don't know the circumstances surrounding the breakup of your relationship, OP, but it's to be expected that separation is hard on your kids, even two years down the line. I think lots of people forget that (not saying you have) and just expect the kids to roll with the punches and be ok with their family disintegrating before their eyes.
Whilst I really do see that in some cases it is healthier for the children for the parents to live apart, I definitely think people are too quick to call it a day sometimes. It becomes all about their happiness with no thought for their kids feelings on the matter. Again, OP, I'm not saying this is you. I don't know your circumstances.
I'm not saying that people should simply exist in unhappy marriages for the sake of the children. Far from it. But I do think people could work harder at getting things back on track in some cases. I mean after we had DD, my husband drove me fucking bananas. He could do nothing right. Our marriage was a disaster. I very nearly left him (I see now that I had PND). But I didn't want that for DD. She ADORES her daddy and I couldn't separate them. So we worked bloody hard and now things are good again. I don't think many people want to work at it any more.
Clearly I am not talking about cases where one spouse abuses the other. Obviously that's not good for anyone.
Anyway, apologies for the brief derailment/rant. Affected by this personally right now. I'll get down off my soapbox.