Hi I was meant to go for a family lunch for Father's Day with my boyfriend his daughter and his parents , we were picking his daughter up on the way , we don't live together but have been dating 3 years and I get on well with everyone , we were literally ready to go I was dressed hair make up etc and looking forward to it when he said do you mind if you dint come as she wants time with me without you , obvs if I would have known earlier I would have let it go but feel so rubbish I was just dumped from arrangement , should I be mad at him ? His daughter is 15