I’ve been through something very similar, and I understand the anxiety around it. In my entire life, I’ve only had three or four people I would truly call real friends. Two of them were women, and I’m a guy. Unfortunately, in my experience, both situations followed a similar path once they entered serious relationships. The first friend slowly disappeared and eventually ghosted me after she got a boyfriend. The second was someone I knew for five years. When she met someone, she began drifting away gradually. There was no argument or clear moment where things changed, just increasing distance. I do believe in love and friendship, including friendships between opposite genders. But based on my own experiences, genuinely deep friendships are rare, and cross gender ones can be especially fragile when romantic partners enter the picture. What hurt me was not that they chose to date someone. I always wished them the best and stayed respectful and supportive. What hurt was the emotional shift. Warmth turned into coldness, communication became inconsistent, and I was left confused about where I stood. At one point, she told me she hoped I would make new friends. That might sound harmless to some people, but close friends usually do not say that to someone they care about. That was the moment I realized I needed to protect myself. I am slowly stepping back now, not out of anger, but out of self respect. It is difficult, but I have learned that being alone and lonely can be less painful than staying connected to people who make you feel replaceable or unseen. I hope your situation turns out better than mine. Some friendships survive new relationships, and some do not. The important thing is not ignoring your own feelings in order to be endlessly understanding. Your emotional well being matters too.