I’m 16 he’s 21🙄

So we barely dated 5 months ago and i don’t know if its right im in the custody of my grandparents💕 they let me be with him and all and after the 2 months together he came to live with me and my grandparents🤥 thats the sad thing that know my grandma never buys me nothing even if I give her money she always says theres your bf ask him like it hurts cause it feels like i don’t exist but after he moved in she didn’t pay attention to me like nothing😞. But i mean she does gives me advice and talks to me and likes my bf as a son too but I think because he gets paid good at his job but still it hurts idk what to do to change the situation because I’ve been living with him for like 3 months now and if he moves out it wont be the same💁🏽💁🏽💁🏽 Oh FYI I HAVE A JOB FOR THISE JEALOUS GURLS OUT THERE ALSO IM LOOKING FOR A HOUSE TO MOVE OUT EVEN THO THAT WILL HURT MY GRANDMA!!! any HELP