I lost my iphone 5, how to tell my parent?

I lost it almost 4 days.
i just used it 4 months, i'm afraid my parents will going to kill me.
up until now i haven't told anything to them.
i'm still searching and hoping i can find it so it is just like "nothing happened"
but as the time goes by, my fear has doubled and doubled.
what should i do?
how am i supposed to tell them?

Yikes! I hope you find it. This is what you tell them: "Mom, Dad, I know that you're going to be really disappointed in me when you hear this, but I lost my iPhone 5. I didn't tell you sooner because I thought you guys would be super mad. But the guilt of lying to you guys was killing me, and I had to tell you. I'm very sorry, mom and dad. I'm still looking for it, and I'll tell you when I find it." Then give them a big hug. Memorize this, and you're good to go!

Try the find my iPhone app just go on icloud.com. If that doesn't work like your phone is off and stuff I'm sorry. Just be honest with them it could be worst, I think that if you tell them you honestly don't remember how you lost it. I got ugg boots stolen with my iPod in the boot out of my locker. I was scared but you know everyone makes mistakes your parents have too ; they may be upset at first but I'm sue it'll be ok

Go up to them when they seem to be calm, not busy, and having a good day so far. You don't want to enrage an already unstable person, because that just spells disaster.
Then tell them to sit down, and that you have something to tell them.
This will make them expect the worst, but the news will be less than the worse.
Next, say "I've been looking for it everywhere, but I haven't found it. I didn't want to tell you that I think I might have lost it, but I don't know where my iPhone is."
They will probably react a little after that, but then say you will keep looking for it, and really want to find it. Just take responsibility for your mistake.
And by the way, have you used the "find my iPhone" app? Because that might help, if you already have another apple device you can access the feature with.

You can download "Find My iPhone" on your other apple device, or go to iCloud.com and log in, and click on find my iphone.
Click on Lost Mode.
or click on play sound, maybe it's in your house.
You can tell your parents the truth. Listen to their lecture, because they're right about it. Say sorry, and tell them you'll never lose it again if it's your first time. If you lost things multiple times already, still apologize. Don't cry.