Is this considered thief?

Hello, i am a highschool student in morroco,this is my last year and like every year my parents make me attend extra hours multiple times a week(50€ a month three times:maths,physics and science),the thing is that as for now i don't really feel the need for them and last year i got a good grade while skipping most of them,now i skip them aswell without my parents knowledge but they still give me money every month and i don't know what to do with it... I wanted not to touch them at first and give it back to them at the end of the school year but it'll be too suspecious to have 150€ in my bedroom everymonth,so now i'm thinking of using them and whenever my dad gives me money after graduation(like he does with my sister,200€ a month) i tell him that i only need like 150€ and give him the 50 back,and with time i'll be debt free,and incase he dies(i even thought of that) i'd give money to homeless people in his name until i'm debt free again,i'm now only scared of if I die, i'll have to face god knowing i stole money from my dad,even though i don't want to,and my niya is just to give it back to him,if i could i would without hesitation, he always buys me what i need and i never thought of stealing from him. A friend told me that god wouldn't punish me since my niya is pure. (Also i tried talking it out to stop extra hours but they don't understand and keep yelling,they don't believe in my capacities at school while i'm a pretty good student) PLEASE HELP