After breaking up with Clary , Simon understands how important she Simon is dating with Isabelle and he knows this beautiful girl truly loves him, he doesn't happy about it. He still loves Clary. Although he knows Clary is Jace's girlfriend now he still has this feeling to her . Seeing her with his best friend is slowly kill him...
- Are you okay, Simon ? - Izzy nervous asks ?

Yes,Clary is dating with Jace now and I can't do anything to stop it - Simon thinks

- No , what are you saying ?

- uhm, there will be a party at our school next week , can I come with you ? Izzy asks shyly

- Sure, you are my girlfriend.
- It is going to be fun. Oh, I must go home now . Goodbye .

Simon stands there looking under her shadow . Izzy is gorgeous and he knows a lot of people eager to obtain her love . Regret that his love was for Clary.
Simon shook his head , reach hand into pocket and slowly walk back home.