I want to start off by saying that this is off topic for this group but I dont know who else to ask but my friends here. Also I want to thank you in advance for any help you might offer.

I am engaged to the best woman in the world and she has three kids. I am trying to do everything I can but I am having issues with the 12 year old girl. She is the oldest and has several issues, but can be a great kid when she wants. She wants me around all the time and I give her all the attention I can, but it never seems like it is enough. I have been trying to help her with her homework, but I cant get her to understand it. She keeps saying that she gives up. There is alot more to the story, if you would like to know or have any suggestions please pm me. Thanks