My girlfriend's ( 18F ) birthday is next month and I ( 18M ) don't have enough money to give her a gift

My girlfriends birthday is next month and I don't have enough money to give her something I am going to make her a birthday card and I will put alot of effort in it but I feel a deep regret that I can't get her something She bought me a watch worth 3.5K ( INR , tho thats alot of money in India even if it sounds little ) , made a very cute gift card , she gifted me alot of stationary too because I am a student studying to get in a medical school She is the love of my life , I wanna show her that I care of her alot. But I don't have any kind of job and I don't get an allowance from my parents. I have a little money saved up ( 500 INR ) but I still feel like shit because I can't do something equal for her.

Forgive any grammatical errors

TL:DR : I feel like shit because I can't give my girlfriend a gift she deserves