Bridesmaid rant with question

HEADS UP ON THIS LIL RANT. question at the end!
So I'm having a bridesmaid issue. Let's start from the beginning. 3 weeks in advance I made an apt for me and my bridesmaids to get fitted for dresses. I want to be there for the bridesmaids apt because well that's what u do! I want to make sure they like it and it's comfortable and what not. Which is coming up this Friday. All were able to make it but one. No big deal I thought! I'll make one for just me and her to go. So I make the first apt and she canceled. I was annoyed but said fine I'll make one more but u better be there for it. I'm not going to keep calling this place and canceling. So today rolls around its her 2nd apt date! Haven't heard from her assuming not worrying about it cuz she would call me right? Wrong! I get to the bridal shop and she's not there. I call her and to find out she rescheduled again! At this point I'm pissed I wasted my time driving there and waiting on her. She's like I didn't think u wanted to be there. I've told her multiple times I'm going to be there! I feel like it's my job to be there. I want to see each girl in the dress! I'm kinda at the point I feel like this isn't going to be the only conflict with her. I'm also asking myself is it worth it. I'm really debating on just telling her forget about it. I have enough to stress about I don't need to stress about one bridesmaid. She's also latley been trying to make me feel bad about having a big wedding. Telling me my priorities are in the wrong place. I should put money elsewhere. My parents are old school and feel like it's their job to pay for it. I'm also paying for stuff and offered to help pay my dad with stuff. He sounded offended when I asked and straight up told me no! I'm grateful my parents are giving me a beautiful wedding. I'm not going to feel bad just cuz she wants me to. My question! What should I do? Should I keep her as a bridesmaid or tell her forget about it?