Daddy issues

Around 2 months ago A life began to grow in my stomach and I was unaware of this situation until just recently. Im 15 years old and the father is unaware of the pregnancy. I feel like he absolutely 100% has the right to know what is going on and I feel like his should have his input, But I don't want to stress myself out due to the fact that I've decided I'm going to get an abortion. I want him to know this, but I'm not sure how he is going to react or take in all of this, and I'm not all that sure I want a second opinion on this one, How the hell should I tell him? And is it right if I add stress onto his life also? Because I feel like I shouldn't even tell him at this point im just so lost.