I cannot stand my boyfriend’s dog and I don’t know what to do about it?

This dog is mean. MEAN! She has her moments but she is so unpredictable and you never know if she is going to bite you or not. My boyfriend does nothing to discipline her and her training sucks. I want to mention that I absolutely love dogs. I have three of my own but she is mean to them. She’s bit 2 of them already so she is not allowed to be in my house anymore. She has to stay in the basement. It’s a nice finished basement so it’s not like she’s in a crappy cold basement everyday. God forbid my boyfriend leaves and she cries and cries and cries and just does not shut up! I don’t know what to do. The dog is a lost cause.
I cannot stand my boyfriend’s dog and I don’t know what to do about it?
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