I accidentally cracked my iPhone 5! Need urgent

Okay, so I somehow dropped my phone which was laying on the edge of the sink bench which was so stupid of me.
And because it was in a bathroom the floor was very strong, hard tiles. When it dropped it hit the ground and flipped onto the back side. I was relieved that it turned over for I thought it didn't crack or anything. But then when I picked it up, a crack that reached from the top to somewhere around the top on the side appeared. I got so freaked out.
I already cracked this phone before and my dad fixed it, paying almost $100. And now I'm really scared. You can't feel the crack and it isn't effecting much but I'm afraid he will kill me!
I need really, really good excuses.
And I know many of you will say "Just tell the truth."
He will literally disown me, so as long as I have a good excuse he'll let me off. I don't care if I can't fix my phone ever again, as long as he is fine with it then I'm all good.
He fixed it about 3/4 months ago so I've been panicking about how he will complain about money problems which we've been going through.

I know you will not like this answer at all. This is because people think emotionally about the answers given here without looking at the practical way it is answered, So this is not a big deal.

The issue here is that even after breaking the phone once before you still did not learn to be more responsible with it. The fact that you are only looking for, I quote " I need really, really good excuses. " indicates the same thing that you are not willing to own up this mistake you made ( again!)

If you knew that you Dad will flip out, if you know that you have money issues if you know that you had broken it once before, if you know that he will literally disown you, then why didn't you guard the phone with your life?

Some or the other day soon he will find out that the phone is broken again,(Thanks to you) what will you do then?

So it is better that he know that the phone is broken, right now then later.