im sorry to hear that :-((( its common to feel s**tty at the end of a school year but you sound like youve had a harder time than most! over the summer, take some time for yourself. read some books, go outside for walks, and spend some time with yourself. if theres any way you can ""apologise"" to your parents that sounds sincere and gets them to un-ground you, that might speed up the process! you dont need to mean it, and it doesnt matter if you dont, but its far more painless to fake an apology to get un-grounded sooner. what did you get grounded for, if youre comfortable sharing? i might be able to help you construct something to say to them.
and, happy birthday for tomorrow :-))) i hope you can at least get some cake!