When looking for a roommate, is it true that you shouldn't choose your friends?

i live with one of my best friends very happily. we're probably a rare exception

It depends on the people, you may find out things you wouldn’t have known, like they don’t pay their bills, or they consume your food or other things.

Yes

I've heard that you shouldn't be in a relationship with them

For friends, idk.

If you are effectively the landlord then it's much harder to kick out your friends than someone who is just a lodger.

Even if not looking for a roommate,I could never turn a friend away if homeless.

Yes. Ive been screwed over. Then i had to kick his ass out. The friendship ended. Dont do it

It can ruin friendships if somebody is a bad roommate.

Yes. You'll eventually end up hating each other.

Living with an unfriendly sounds worse.

I would prefer a friend over a stranger

It really depends. On one hand, living with someone can definitely wreck or strain a friendship. On the other, you should live with someone you know you can trust, and with a friendship trust has already been established.

Not necessarily. Just make sure your habits and their habits are in harmony.