How do i tell my mam im biual?

i would sit here down and just find out if she is against it. or your other opion is to say mom sence i know that you love me and that you know that everyone is different i wanted to let you know that i am bi. i thought sence you are my mom and my friend you would like to know this sence i trust that you will be fine and no mad at what i am when i cant help who i am. just be honest you are almost 18 she cant say no you are not bi. you cant help who you are any more then you cant live with out food or water.