(Pls Advice Me)-I’m Pregnant For My Blood Brother, We’re in Love & I want to marry Him

Pls Advice Me : Am Pregnant For My Half Brother, What Should I do? Read what happened below
I was having a s.ex relationship with my half brother secretly but now am carrying his pregnancy, please. advice me on what to do ,because my daddy will kill me if he get to know and a doctor advise me not to go for any abortion, am ashamed of my action…
I really love him and want to marry him.. he is so good in bed