Questions and Answers

 I didn't really understand the ending though. I understand the story overall, of how governments can control their people and how we shouldn't let things go too far in the real world or the book could become reality. But I don't think I understand the significance of Winston finally loving Big Brother. The answer for this question and others I found on the internet.

As for why Winston does end up loving Big Brother... The Ministry of Love was there to make people love big brother (through torture, but you know, that was its purpose) so they wouldn't have released him if the job wasn't done. Also the book is meant as a warning, that is why Winston can't win, if he'd won, the book would be saying that no matter how bad it gets, we can always triumph, and that's not the message that Orwell intended.

Is big brother a symbol for anything? 

Big Brother is the symbol of the government itself. The government isn't any single person, it's a monolithic entity made up of an unknown number of people. Big Brother is just the symbol they use to remind people the government is everywhere at all times.

And what was the significance of Room 101 and Winston finally betraying Julia, what was so important about Winston betraying Julia that they even set him free for it?

Room 101, it gets rid of the last obstacle. The party used their basic instincts against them. It's like if blinking=betrayal and somebody was jabbing their finger in your eye, it's impossible not to blink. You could argue that betrayal doesn't equal lack of love, but just imagine yourself in Winston's situation. It'd feel pretty weird loving someone you betrayed and who knew you'd betrayed them and had in turn done the same to you. You have to keep in mind Julia also betrayed him. 

At one point or another Winston says, or thinks, I can't remember exactly, that the one thing they can't take away is there love. Surely they can't make anyone change their REAL feelings about someone. So if they keep loving each other Big Brother can never win. At the same time, Big Brother knows this. It's stated several times they don't want anyone to have meaningful relationships, they only want them to love Big Brother. Also Winston talks about making love as a political act. That is, every time they made love it was a statement against what Big Brother stood for.