I'm so sorry you have to deal with this. Know you're not alone though!

On my 18th birthday I begged my dad not to bring his new girlfriend (My birthday is in August and I had found out in April that he had been cheating on my step-mom with this woman). He had been telling me for years that if I still wanted a tattoo at 18 he would get it for me. I told him all I wanted for my birthday was to go get my tattoo with him and go to lunch with him. Maybe go to the mall or a movie or something.

So what does he do....shows up with his girlfriend. They ended up leaving together and I never had lunch with him or anything. It might have been the worst birthday of my life. Not to mention the rest of the day was spent crying.

I'm sorry you have this going on. You were the bigger person and that's something you can be proud of.