how to stop myself from buying so much stuff online

Easy Solution, Get your mom to take away your credit card. Easy

I'd just move all of your money into a locked checking account so you cant blow it on pointless stuff.

Open a bank where you can't take the money out of it, or send payments online.

The way I helped myself from buying stuff online was to convert all my money to crypto because that why I'm limited to what I can buy. But, other than that the best way to save is just thinking about your future and thinking "Do I need this item? If I buy this item how will it help? Is it important?".

Close your computer

click start and shut down or smash your pc

earse your credit card information from that sites, and afer a buy think if you really need it

if you dont want to spend your money, you can give it to me, i promise i'm don't gonna spend it

Think of something that you need, for me I use to spend my money as soon as I got it but I realized that going to university next year if I don't have $ I cant afford rent.
Just prioritise it, if you don't have anything, just leave it there so you can flex with it

Spend all your money and wonder where it went. Then you don't be able to buy anymore. But for real I used to have this same problem, treat yourself, buy what you want but don't spend more than you make.

Why do I relate so much to this lol
I have a problem too, always impulse buy things and im like great now im poor >.>