We have been back together but what he said keeps replaying in my head. does his daughters not really like me or what?

My boyfriend was really upset with me and he said something that really cut me deep he said “ my fucking family is falling apart because I keep choosing you”. He has two teenage daughters and one 5 year old son
We have been back together but what he said keeps replaying in my head. does his daughters not really like me or what?
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