As long as you have money, she will 'genuinely like you'. As for cost splitting or even treat you initially are all part of pig butchering techniques used by WLs to eat naive Sinkie men like breakfast since time immemorial, rinse and repeat. Case like yours have rarely end up well.
A cheekon will always be a cheekon, just enjoy the time knowing that 玩归玩，守住本心见好就收 can already, then move on to find another substitute. You must always have two or three as standby substitute like a diversification strategy so that no single WL can hold you at ransom mentally and emotionally to fall into KCT.
Cheonging always comes with high risks and you must practice extreme discipline over your mind and emotions. Treat it like fighting a war, else you will 走向一个必死无疑的结局.
Whatever WLs are doing to you, you must 沉着应战 and use the same strategy with ZERO mercy to secure victory over WLs at all costs.
In case something untoward happens, fret not and always remember..:
" 人善被人欺，马善被人骑 – 所以男人想要站得稳，必须心要狠, 要敢硬气一点她们敢跟你拼命吗？"
Just like Warren Buffet's investment principle: Rule no. 1: Never lose money. Rule no. 2: Never forget Rule no. 1.
人非草木, so if feelings are invested which is normal for humans, make sure it is reciprocated. Same for money, make sure the time you spend with them is worth every penny and you come out from the room with a smile having 'secured victory' and completed your mission, else move on.