I am pretty good at budgeting (eg shopping at cheaper supermarkets, having a £50 weekly budget I generally stick too, my parents give me money at the start of each semester) especially because I live in an expensive area, however I'm in a mindset where I just.. don't want to spend money?
I pretty much only spend money on necessaries, and I always feel really guilty that I never invite my friends out (all of whom are commuters with jobs) or spend money on things I'd like/need which aren't necessaries (especially clothes). Whenever I run low on food before my weekly shop, I either don't eat or feel guilty that I've just spent me when I probably shouldn't have. When my friends do invite me out, I always awkwardly ask if we can go to the cheapest places available.
I feel really guilty, but it's making me miserable to the point where even if I do buy something I feel like I will regret it. Furthermore I have a reputation for being the worst out of my sisters (both also at uni) with money, so I have a lot less money than them.
Sorry for the rant, but does anyone have any advice?