Confused boyfriend and daad issues

My boyfriend and i see to always fight about my dad. I am 20 years olds and i have not not been with my dad since i was like 12 years old. Its just been my mom her boyfriend and my sibilings. During the years of 12-20 years old i have never really heard from my dad beSides him dropping of child support money or seeing us once in a blue moon. I always lived with my mother who would always tell me to forget about my dad(not sure if she only said that off emotion of not being with him. I never saw my dad more than an hour for all these 7

1/2 years. I dont know what its like to have a father ive been through a lot of things becus ive basically raised myself. During my childhood i did what i wanted to becuz i had no mother or father figure. My mom waz into guys and my dad was into his new wife. I never had a conversation with my dad and i feel akward talking to him. My boyfriend works with him and rides with him to work so he has had more interaction with my dad than me or any of my siblings have had in our whole life. My boyfriend brings me down about having more interaction with my toxic mom who ive lived with my whole life as opposed to my estranged dad who ive only recently got close to for a couple.months now just becuz i have daughter. I dont know how to get my boyfriend to understand that my dad is kind of a stranger to me just like he is to my sister and brother. I have lived with my mother for 20years. Any advice? I know my dad is a good man but this is a man who ive havent reallly interacted with for years i cant really just tell him my whole life story.