I booked expensive tickets to an event for my boyfriend months ago so he's known about it since then. I reminded him last week and he said he'd need to speak to kids mum because she wanted him to take them overnight same night. He went back to say he was busy that night so unfortunately couldn't. She said it would be fine but that it was a works night out for her. He's now cancelled on me saying he must take the kids that night. Am I being unreasonable? I feel like he's cancelled our plans so that his ex can go on a night out! We've had these plans for months and he'd rather upset me than her😔