yes you should
it means he came and you didnt.
Yes. The question is why?
Don't do that because she or he. Will get upset and want to fight your ex and dump you
You should ask her why she's upset.
No.
Depending on what he's done, yes you should. If you're upset about something that your boyfriend has done it's always good to let him know so then he hopefully won't do it again.
kiss him lightly on the cheek it will make him somewhat better
Depends on where you kissed her, if you asked her permission, how you did it, and when you kissed her. It could be she is embarrassed and just doesn't know how to act. Send or give her a funny card and tell her you are sorry if you embarrassed her.
No, everyone has a celebrity crush, just embrace and maybe share your celebrity crush also :)
NO
It depends on your circumstance! Lying is lying and no matter how you look at it's wrong! He probably lied to impress you, keep that in mind, in the end he's still your boyfriend!
Tell him the truth....even though its gonna hurt its better than keeping it inside of you....just tell him. Also offer to let him do the same if he is very upset. It sounds bad, but it would give him a sense of payback