quick vent/seeking some advice

so it’s my birthday tomorrow and i already celebrated my bday with my friends yesterday so for my actual bday i jusy want to chill at home with my family and watch movies and play games the whole day. but my one friend kind of invited himself over last week because he asked me if i was doing anything and i said i don’t think so because i was just being honest because i thought he meant something big. and i have a really hard time saying no to people and i mean i almost canceled on him but he was like “you better not be canceling on me” so then i never actually did. i just said my family might be coming over and they are but i don’t know how long they are staying. anyways, i really do not want to hang out because he’s gonna want to stay over extremely late and i really just want to chill with my family. like i get its new year’s eve but it’s also my bday and i just wanna do what i want to do. however, it’s extremely last minute if i cancel on him now and because irs also new year’s eve i don’t want him to have no plans anymore because of me. so i guess i’ll just have to hang out with him but tomorrow i really don’t want to have to be social at all and have a carefree day. i just don’t know what to do because if i cancel on him, he might not be able to find anyone else to hang out with. i jusy should’ve said no sooner.