To not go on this holiday

whilst she is a CF supremo and could make a nice living teaching at the CF Academy, I think a lot of CFs rely on people being too polite, not wanting to seem petty, not wanting to spoil an evening by making things awkward, not wanting to ask questions when told a sob story.

But I think you have emancipated yourself. You've called her out clearly and not in a nasty way - hence she didn't have a leg to stand on and being a CF could not apologise so had to resort to the closest thing a CF can get to remorse which is "I'm sorry you feel that way."
You could have fun with this by doing the same thing back,
"I hear what you're saying." to a sob story,
followed up with "Your share of the bill is £10.50"

I think you should go since you have paid and the weather is miserable here. You've now proved that you can call her out without hesitation and refuse to be CFed. She must have realised that from your letter. You've already got plans for what you want to do. If she tries it on again "I can't help you. Whatever are you going to do now?"

You've said that in the past she's been charming and you got on OK. Maybe now that she realises you are immune to pleadings, you might be able to resume a semblance of your former friendship for the 10 days.?

@Ickityick she may not turn up - do you usually do airport pick up etc?

Growing a pair comes to us all at different times and yours is now! Some brilliant ideas on how to stop her CFness so if you do decide to go I'd use them! Hope you do go as a FU to her but whatever you do, you've grown your pair now don't ever let anyone ever do that again to you. You're worth way more. Good luck 👍

It's worth going for ONE cheap meal and see what happens.

Then you have it out with her if she tries to freeload

But if she behaves you'll have a better time

Can't understand why you booked the holiday in the first place! You knew what she's like

Lock on your suitcase. And i wouldn't treat for anything, separate bills the whole way.

And I'd take books or headphones and just ignore her if she starts. Room can be used just for sleep

Oh, that’s annoying. Keep your toiletries in their bag in a drawer. Can I borrow…? Gets, ‘you can get some at the market’.

If you’re anticipating spending another £500 on food etc, I’d think about looking up other last minute deals and going somewhere else on your own. It’s going to be really in relaxing spending ten days sharing a room with someone you’re livid with!

I cannot think of anything worse than sharing a room for a week with someone I didn't want to be friends with. I would definitely rather not go. It would be so uncomfortable.

In your position, I would refund her the money and say it's cancelled. Then go on my own anyway.

And cancel her off the booking in case she turns up at the airport anyway.

Yes, this is definitely something to consider. Get written confirmation from someone that you can simply not turn up and she can still go.

Fair enough, easier said than done.

As you are the lead booker, I suspect if you don't go the holiday would be cancelled and you would need to pay her back her money, therefore I would go. Make sure you update regularly!

Could you check if there are rooms available just before you go?
It's unlikely they'll be able to rent them out at the last moment, so whatever price they offer you, I'd counter-offer 1/3 & negotiate.

Honestly op you will go a bit bonkers staying in a room with her for 10 whole days when things are so hostile between you. Even if you do lots on your own during the day. If it was a weekend, fine. But 10 days is madness.

Sounds like a miserable holiday to me. I’d cut my losses and not go.

I would really hate to go on holiday and share a room with someone that behave like that. It would ruin the whole holiday for me. If it was an apartment or something it would be different but sharing a bedroom would be incredibly painful for me!

Well I'm not one to hide away from a harsh conversation.

I'd talk, call or have a coffee and offload all the things that are pissing you off and why you are stressing about the holiday. Then ask her, can you actually afford to go as I have budgeted X. Then shut up and see what she says.

This will either clear the air or determine your decision to go or not.

Are there other hotels cheaper you could look at and just use the flights? The examples you have don't sound petty to me.

I’d still go, but I’d treat it as a solo holiday & I wouldn’t put up with any of her nonsense.
If you feel you’d give in and pay for her, then don’t go. If you can stay civil & just keep reminding her you aren’t her atm whenever the sob story starts, then go and enjoy your holiday. Block out her noise with a good set of headphones 😉

Don't let her have the holiday to herself! That's just letting her freeload again.

You cancelling doesn’t mean she’s won.
You’ve won in that you’ve finally told this woman how badly she has treated you and how disgusted you are with her and that you won’t put up with it any more. You’ve won your voice! And you will find it easier to deal with manipulative friends in future.
That’s all much more important than a holiday. Refusing to spend time with her underlines your point still further and means she will have to pay for herself like anyone else - unless she tries the sob stories on someone she meets there.
only go if you really want to. You can decide on the day.

Why do you continue to pay for her / lend her things?
In your drinks example, why didn’t you ask her to buy her round? And when you went to the bar, why did you buy something for her?
Same with the sunscreen, instead of moving it somewhere less accessible, could you have told her that you don’t want to share and that she needs to buy her own?