Possible

So when you break up with someone sure it takes awhile to get over them but, exactly how long? How can someone even think to be friends with there ex? Its possible of course. It only makes things harder though. So why take the decision....not to loose the person. So after awhile everything is great you guys are friends again and things go back to how they were before you dated. But suddenly they tell you about their new crush and you feel somewhat hurt. Then what? Lying is of course the way to say "oh I'm happy for you" with a smile on your face. But exactly what is that you feel are you really hurt? Or is that feeling jealousy perhaps? Knowing they found someone before you did.