So for this one Im gonna get deep real quick

Uhm so im trying to figure out how to come out to my parents that im bisexual. The thing is is that ive been dating a guy for about a year now and his parents want to meet mine.....my parents are ultra religious dickbags who dont understand ANYTHING last year I went through a rough patch in my life It got so bad I was s3lf h4rming for a while and when my mum found out she PUNISHED me and ik you guys will prolly say "you dont have to come out to them" but im sick of hiding shit I js want to be excepted for who I am so pls send advice it would be mutch appreciated :p