I want to break my no buy... again

So around two weeks ago i bought an eyeliner that wasn't on my buy list. I could cancel the order but still everyday i think about the color and the product and i am kinda obsessed. Do you know this feeling? How can i stop it? I am soooo focused on this eyeliner. Please help me with your advise. Otherwise i did not break my no buy yet

Edit: So i do not own an eyeliner yet, that adds to my dilemma. But your answers helped me so much! Thank you. I just checked my banking account and put the saved money of this month on my savings account (i do not have access to this). This just helped a lot as well - and if i would find excuses to buy it, i will find excuses to buy other unneccessary shit and then i will not save anything. Thank you very much <3 i love this subreddit