<human>: Can you condense the text into a few key points?

So my ex and I were together for three years, had a good relationship. We'd met each other's families, talked about kids, marriage etc. It all seemed to be going swimmingly. I'm close with his family and his parents invited us both to go to Thailand with them in the summer holidays. They were going to pay for accommodation so we just had to pay for our flights. I talked to my boyfriend about it and we thought it would be great, so he booked our flights and I paid him back for my half ($1200). Sweet. 

That was about two months ago. One month after that, he broke up with me. It was a total shock and I was totally devastated. He told me he'd been thinking about it for a while and he just wasn't sure we had a future. That sucks, and it sucks even more that he allowed me to go ahead and book this trip if he felt like that. 

The airline we booked with is budget and they won't let me alter my booking at all, so I can't get my money back or even change the date of the flight and go with friends or something. I rung my travel insurance and they told me my policy won't cover this. 

So I don't know what to do. I have half a mind to ask him to pay back my money, but I don't know if that's just my angry post break up brain talking. What's acceptable action here? I need advice. Thanks.
<bot>: my ex asked me on a trip, we booked it and then he broke up with me. Left me out of pocket and out of holiday. What should I do?