Struggling

I am struggling with some issues tonight. I should be sound asleep by now, but I can't seem to get there. It's been a rough day, and I know that tomorrow is only going to be worse. My sister graduates tomorrow evening, from high school. While that is a good thing, I am faced with dealing with some deep hurts in my life. A few years ago, my dad's wife left. She was only 9 years older than me (another story) and we had become very close. She had become a part of my life prior to me having children. She loved and cared for my boys. She took care of them when I still worked, and they spent every Saturday evening with her and my father. She totally turned her back on God, my dad, my family, me, and my boys. She, her mother (who also now hates us-and yes that is the truth), and her sister will all be at this graduation. Because of that, my boys are not allowed to attend the ceremony. Scott and I decided it is best for them to not have to see her. I've cried most of the evening and do not want to go to the ceremony tomorrow. I know that I will go, but the panic is setting in, the hurt seems so fresh again, and I just don't know if I'm strong enough to handle it. The reality is, I'm not. Only through God can I accomplish this. So, if you've read this and think about it, could you please pray for us. I know that it is the only way I can manage.