How to stop all the other apple products seeing what I do on safari?

Apparently my roommate said all the stuff I look up on safari on my iphone come up on his iPad. How can I stop this? We both have ios7

Use private browsing mode. Do you and your roommate share an itunes account or something?

You are both using the same Apple ID and/or iCloud account. These are not supposed to be shared. Create your own accounts.

The only way he can see what's on yours is if your are both using the same Apple ID.

Get separate accounts and the link will be broken.