Opinions please?
In 2020 I arranged to go on a trip to S Korea with my mum and sister. Summer is monsoon season and winter is absolutely freezing so spring and autumn are the only choices. I wanted to go in spring to see the cherry blossoms but my sister wanted to go in October because it's her favourite BTS member's birthday. If we went in October we'd have more time to save and have more spending money which I thought was a fair point so I agreed to October. Then corona virus happened and it ended being pushed back a year. We could have changed it to spring since it was going to be another year and we could save enough but it was kept at October. Anyway, we booked the air bnb in January for October 2022.
Yesterday, my mum messaged me to say my sister can't go anymore because they've rearranged their family holiday from this year to next year, the week before we go to Korea and her partner has to use his holidays from work for their holiday. So, they want to move our trip to April 2023 instead, which they said is better for me because I'll be able to see the cherry blossoms like I originally wanted. However, when we looked it up the cherry blossoms bloom for a week or two early April when it'll be my two nephew's birthdays. She doesn't want to be in Korea for their birthdays so will only be able to go after the cherry blossoms have died. The air pollution is the worst in spring too so I don't want to go then unless it's to see the cherry blossoms but if we don't go in spring then it'll be October 2023, another year on top of how long I've already waited. I'll have waited 3 years to go.
My mum doesn't really want to go without my sister and feels caught in the middle which is understandable. I'm not very close to my sister so I'm not really that bothered plus we fell out a few months ago and I worry that we'll fall out while we're there. I'm considering going alone but some stuff there is group orientated, for example some restaurants won't accommodate you in busy hours because tables are set out for groups. Plus other things like taxis will cost me more because I won't be splitting it with anyone. Korea is very safe for solo travel in general so I'm not scared of going alone. I don't know anyone else that wants to go.
My sister doesn't really seem that bothered about going, even though she says she wants to she doesn't seem very excited so if I push it back another 6 months or more she might still end up changing her mind and I end up going with my mum or alone anyway. The air bnb we chose is fully booked up to 2023 so we can't change it to a different month next year.
I'm not sure what to do now and I just feel so frustrated. She's now making passive aggressive posts on Facebook about it and is more annoyed at me for not wanting to rearrange it than she is with her partner who booked their holiday the same dates as our trip even though he knew when we were going.
What would you do?