The fear of spending money as a student

Im a college student in which Im still use my parent money. And I do have a saving fund which I dont have to worry abt spending it. Even so, I have this kind of mindset of not spending money on stuff that isn't worth or important such as purchasing game, microtransaction on games, expensive foods, clothes etc. I would say on most thing on this world. Even If I have a desire onto something, I often thinking abt spending my money on it whether should I buy it or not. The outcome is always the same whether I make the purchase or not. The regret of not spending on something I desire and the regret of purchasing something that is wasting my money. And since Im a student I track every transaction I make and I actually spend most my money on food which make thing worse for me. Even I did spend some of my money purchasing game and skins, I often feel the regret of spending it thinking "I should've save the money on something more important" . The problem is idk whats define important here. I lived alone by myself, saving money cuz If I did it would be a waste, and Im not even rich by any mean. Sure in certain situation where money is very necessary, I dont rrly feel bad like spending money for food as long its not over budget, but this feeling has drive me crazy cuz The guilt for money that Myself had to decide