Why did my girlfriend lose friends and followers after getting into a relationship with me? Should I be offended?

I just noticed how all of my girlfriends friends disapprove of me and talk poorly on me all the time, despite not even doing anything. She lost a lot of followers and friends because of me and I don’t know if I should be offended cause of that, all my friends adore her and hers just hate me
Why did my girlfriend lose friends and followers after getting into a relationship with me? Should I be offended?
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