I am 15 years old, will be 16 in august. im pregnant. how do i tell my dad?

I have been dating my boyfriend a bit over a year now. My dad and I are really close and i know the disappointment he will have in me when i bring him the news. Also, i waant to have this baby. My mom will also be very disappointed and i feel as though i will be hated for getting pregnant. my boyfriend is really excited to be a dad. he is 17 years old and is looking forward to the stress of a baby. i am waay in over my head. what are my options. what can i do? what should i do? how do i tell my dad?!