I used to have a girl betta fish and she lived with other fish and people now are saying that bettas can't live with any other fish. If so, what can they live with because I feel bad having my soon to be betta living all alone. I'm getting it tomorrow!

I'd feel sorry for the poor fish you put in there with it. From my experiences- betta are extremely aggressive and will fight and even kill other fish. They aren't called fighting fish for nothing!

Male beta fish are highly aggressive and will fight and destroy any fish you put with it.