Going to my friend graduation

So I have this friend (let's call her friend A) texting me if I want to attend my other friend graduation (friend B). I don't really want to go because:
1. I, myself, don't really have much money atm. I'm still looking for a job, so I'm financially unstable.
2. I did graduated few months ago. And this friend A and friend B didn't come to my graduation ceremony. I'm fine with it tho because I don't really care.
3. I'm not that close to this friend B. We never texted etc etc. We are just friend. But this friend A is my close friend. But idk if friend A acknowledge me as her close friend or not because she has many friends

So should I lie or should i tell her if i don't really have money atm? Why i need money is because flowers and cake is not free to get..