my (f19) boyfriend (m19) implies that he wants me to change my accent

so i f19 online in scotland, born and raised here, but i was in 7 different care homes for 10 years so i have lived all over scotland, Moray, Inverness, Aberdeen, Perth, Dundee, Edinburgh and Glasgow. i was born in moray and i lived there until i was 7, then i got taken into care and was there until i was 17, i left in june 2021 and i’m back in moray. the last care home i lived in was in glasgow. i had picked up multiple accents and dialects throughout these 10 years but i think the glaswegian accent stuck the most. when people meet me they can’t tell where i’m from. my friends in moray say i still sound glaswegian. for some reason everytime i say scottish slang or pronounce my ‘r’s a certain way (if you’re scottish you know what i mean) my boyfriend m19 and i have been together for 2 and a bit years, but he gets really annoyed and says ‘why are you speaking like that’ or ‘don’t speak like that, you sound like a junkie’ and pulls a look of disgust. idk. feel bad about myself because of it . i deliberately change the way i speak now but sometimes my accent slips out and i don’t mean to. im not sure what else to include