Boyfriend broke up with with me over me lying about drinking and thought I perhaps may have cheated, what was his real reason why he wanted to break?

He claimed that was a deal breaker but also he has domestic violence charges against him he said he left because he didn't want to hurt me I'm confused on if this is true or not
Boyfriend broke up with with me over me lying about drinking and thought I perhaps may have cheated, what was his real reason why he wanted to break?
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