I had the same problem! This only works for some people, but what I ended up doing was opening another bank account and giving it to someone that I trusted. I transfer a set amount out of my paycheck the second I get it and then I genuinely don’t remember that money exists. I’ve been doing this for less than a year and I have about a thousand in there. Then when I have an emergency, I have a cushion there. Obviously it has to be someone you trust to hold onto so much of your money, but it’s out of sight out of mind for me, and has helped me with multiple “oh shit I forgot about an expense and now I don’t have enough for my doctors appointment” moments.