Hmm... She might be mad at you for something. Think really hard cause girls tend to give people the silent treatment if they're angry with them in some way. Also it sounds like she's trying to make you jealous by flirting with the guy.
Talk to her and see what's up. It might be something important or she may have just been busy like you say. Talking and being open is the best way to resolve problems in a relationship, in my perspective.
Good luck :).
Maybe she does not like you its okay don't be so into her stop texting ask whats up why aren't you talking to me follow her around don't let her see you and if she is with another guy maybe it's a family member.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.