Advice

So my mom thinks im trying to fail on purpose because of my boyfriend and hes a grade lower than i am and i skipped a grade so im in 11th and hes in 10th i had the same problem i did last year this year so last year i started off in algebra 1 bio1 and instead of english they switched me to reading when i switched to pre algebra and pre biology which is bio 1b and algebra 1 b. And i passed because i didnt know what they were teaching me in algebra 1 or bio 1 and i learned it in pre algebra and bio so now that i passed instead of them putting me in algebra 1 and bio1 they skipped that and put me in bio 2 and algebra 2 and i missed out on everything we were supposed to learn last year so i know nothing this year because i wemt back and even tho i explain this to her alot she still blames my boyfriend now that im failing and wont get me the help i nees to pass i need advice please from somebody who understands me!