Birthday

I’m upset so both plans for my 21st were ruined. Both times are now because of my moms boyfriend and I’m pissed and upset because it was supposed to be a good day. Now I’m a week away with no plans at all for my birthday I don’t get how this is fair. The first plan was the beach that got ruined because my fiancé can’t drive at the moment and my moms boyfriend dumped her and left. Then we planned a bonfire at the house with a bunch of people and after one day he he came crawling back and is now living here again meaning I don’t want nor do I feel like a party is welcome here because of him. I don’t know what to do like I’m seriously crushed because again this was supposed to be a fun weekend for me and now it’s all ruined.