@blackdove
You have to act the way your heart tells you to of course, but as I see it excluding everyone who doesn't see the bible the way you do, or not even believing....if you exclude them then you may just end up with very few or no friends. That would be a lonely way to be a teen. The other way might be to base your friendship on whether they are a nice person or someone you like. If they are not Christian, you might just rub off on them.