how do i tell my parents

I'm 18 (I'll be 19 before the baby is here) and just found out I am pregnant on NYE and took a blood test that also came back positive yesterday. My parents were 14 and 18 when they had me so they can't really judge but i still have no idea how to tell them! my boyfriend wanted me to get an abortion at first but I told him I couldn't and now he's really supportive. Any advice will help

UPDATE I told my dad and step mom they took it so well I'm truly blessed tomorrow i have to tell my mama so wish me luck!!