Just adopted this puppy without seeing her first. Was told it was going to be a boston terrier french bulldog mix. I think this might be a pitbull. I have a 20lb Boston terrier at home already. What’s the move here?

She’s really cute as of right now and I like her a lot but I wanted a dog similar size and persona to my current one and not sure if I could ever leave those 2 alone together. Need advice asap