I have a good friend who for whatever reason has a lot more disposable cash than I do, particularly it would seem at the time of year. Next week we have night out arranged with a group of mums. I want to go somewhere reasonably cheap, I just don't have the spare cash. She wants to go somewhere much more expensive. She's making this really unpleasant citing other things I'm spending money on e.g. Xmas presents. I just can't do everything. We're also going to the cinema with another group a different night and she's trying to arrange a meal beforehand, again I just don't have the spare cash. I feel like I'm being mean and spoiling things. I feel like she thinks I'm just making excuses. How can I make her understand without falling out?