Try to talk to your mom about how you are feeling...you will most likely feel much better after you do. It's great that you know she loves you with all of her heart...not all teenagers feel that way about their mothers. It's a sign that you have a good relationship at it's core, even though things may be stressful now.
It must be a difficult adjustment to see your dad with another woman. Even though your dad made some choices you don't agree with, he is your father, and it is only natural to want your parents back together. It sounds like even though you do not really care for his girlfriend, you were still able to sit in the same room with her and have dinner. This shows a level of maturity and respect for which you should pat yourself on the back!
Keep reaching out and allow yourself to cry if you feel like crying. Have you tried journaling your thoughts and feelings as a way of expression? Check out the cool journal pages on our website: www.yourlifeyourvoice.org
We are here 24/7 when you need to talk.
Take care of yourself, and hope you have a better day tomorrow!
Cynthia, Counselor