DIZZINESS WASHED OVER CLARY, AS IF ALL THE AIR HAD BEEN sucked out of the room. She tried to back away but stumbled and hit the door with her shoulder. It shut with a bang, and Jace and the girl broke apart.
Clary froze. They were both staring at her. She noticed that the girl had dark straight hair
to her shoulders and was extremely pretty. The top buttons of her shirt were undone,
showing a strip of lacy bra. Clary felt as if she were about to throw up.
— City of Glass by Cassandra Clare
Chapter 6: Bad Blood
I know that I’m supposed to feel sorry for poor Clary, and normally I would. I’m not a heartless bitch, and I can understand feeling as if your heart is being ripped out of my chest. When I broke up with my first love, I was literally wailing on the floor like someone murdered my dog in front of me. However, I don’t feel sorry for Clary because in the last book Clary told Jace over and over again that she didn’t want to be with him.
And when Jace finally takes the hint and tries to move on, Clary can’t stand it. This is not just someone in shock and jealousy, which would have been normal for anyone in that situation. As I read on, I realized this is: “How dare you try to move on from me.” This is a bigger version of the reaction of how Clary reacted when Simon was seemingly trying to move one with Maia.
Of course, that was never the case, because Simon can’t be with his precious Clary. This is the most realistic I have ever seen Jace. It is normal when you are a teenager to date people and breaks up. It is really normal to date for a few weeks and or months then break up and move on. Yes, there is a tiny minority of people who find the love of their love of their lives in High School. However, in Young Adult fiction is everyone finds and stays together with their first love; and this simply not the case.
Why shouldn’t Jace move on with Aline? I know it’s not true love, but it doesn’t have too. It is perfectly fine to experiment with different partners. As long it is safe sex, and the person with a vagina is on birth control.
So in conclusion: Yes, Clary has all the right to be jealous and shocked. However, she told Jace she didn’t want to be with him and she has no right to demand him not to move on.