Wanna impulse buy a plane ticket to Amsterdam so I can spend Christmas with my gf

Because I didn’t buy in advance , the price has shot up to £180-200. Normally it’s £80for the round trip so yeah I am basically getting robbed if I buy it . But I really want to spend Christmas with my girlfriend . I can afford the ticket with my neetbux, but it feels like such a rip off cuz I’d only be spending only like 5 days there . I really want to be with my girlfriend she’s my only person .she will be gone for two weeks🧍‍♂️ and I had a huge argument with my mum so I’d rather avoid her .