Help with my english! :(

Hey guys! I’m Jenny, I’d love to improve my English so I’m taking some classes here in my city, but I’d like to go beyond that, so, besides practicing I want to expand my vocabulary in a way I’d probably wouldn’t do by talking (since we normally don't use those words), and that is through writing, but there are things I just don’t know how to say and I wondered if you could help me out ^_^

So, these are some paragraphs I wrote myself but that probably have mistakes. I’d really appreciate that you’ve taken the time to read this post :) My deepest thanks!

- The move day seemed (OFF: is it valid to say Move Day? I mean, the day of moving to another house) to have no end, especially for Marie’s indifference toward him.

- She had been playing "cat and mouse"  with him, appearing and disappearing from his life.

- “When you asked me to come with you I was about to accept, but I decided best to give you some time alone, and see how you carry on with your life, if you'd be able to live without me”

- “You cheated on her with me and you didn’t care about her feelings. In the end I attended the fake wedding and in the honeymoon I told Jeff that I left him for another man”

- He hated her, how was it possible that after all that, he could not even take the first step downstairs? She was right, in all that time he had realized more than ever how much he loved her and needed her. Two years ago that love was not that big. He needed that suffering to clear his mind, change his life, set his priorities, and especially to mature.

- They were simply two human beings who either by fate or rather their own decision needed each other, complemented each other and would live to love each other madly.

Another doubt I have: how do you say when you’re going to meet someone but you never appear without letting that person know you won’t be there? In that case I jilted him? Or I stood him up?