<human>: Hi!

My dad is retiring in two weeks and is paying for my whole family (my siblings, their SO's and kids) to go to France for a week. My parents paid for plane tickets and the house, but everyone has to pay for their own food etc. (though my parents will cover some expenses.)
They invited my boyfriend to go with us, he said yes and we bought him a ticket, it was quite expensive, but as they'd paid for everyone else, there was no doubt on their behalf that they'd pay for his too.
He broke up with me, right after Valentine's Day. A short while after we'd broken up I asked him about the trip, and said that if he got a doctors note around the time of the trip we'd get the money back, his sister is a doctor so he said it shouldn't be a problem. I just brought it up again, as were leaving soon, and asked him if he has travel insurance as the doctors note only works if you have insurance. He said he didn't have insurance, but told me to give him an account number and amount and he'd fix it. The ticket was almost $400, I gave him the exact amount and my accounts number, and his response was 'wow that's a lot. I talked to my parents, isn't it reasonable to split the cost?'

I personally don't think it is. My family paid for this trip, he broke up with me. I've given him several months notice. I told him I don't think it's fair to share it as it was his decision to break up, but he could always buy travel insurance now, and get the doctors note. That will be cheaper for him and we'll get our money back.
Am I wrong for thinking he should either pay for the whole ticket, or get insurance so we get our money back?

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<bot>: ex-bf wants to split cost of plane ticket my parents bought him before we broke up, because it's expensive. He broke up with me.