Am I wrong ?? 😕

My baby father has this girl who he constantly says isn't his girlfriend (not my issue just giving brief details) this girl has made it her duty to put her nose in my business everytime something happens ! Before I could even tell the people I wanted to she had already did the honors .. I just really want her to mind her business whether that's her SO or not I feel like what me and my baby father have going on is between ME AND MY BABY FATHER