Uh oh i really don't to get in trouble?

My dad has an iPhone 5 and he is going to connect it to the computer and i want to know will he get my apps downloaded on there because if he finds out i have instagram it won't be a very good conversation

If he has his own account (Apple ID) he will not see what you have on your account. If he uses your Apple ID he will see all your stuff and get all your messages etc. So make sure he sets up his own Apple ID.