[19M] Did I err by investing too much energy into this friendship with a [19F]?

I attended an all-boys school and had never had a female friend before. I always longed for that connection, and when I started college, I met a girl on my very first day. She was the first woman I interacted with outside of my mother. I made a genuine effort to bond with her, but our conversations were mostly limited to academic matters, and I was always the one to initiate contact. At one stage, I helped her secure an internship at a major multinational company. I also sent her study notes and asked her to let me know after she read them—unfortunately, she never did. I ended up completing our project on my own because she forgot to assist me, later saying, "Sorry, it completely slipped my mind. You should have reminded me." I responded, "Yes, I was always the one reaching out first... Am I not also your friend? Have you ever spent even five minutes for me?" That was the moment I finally admitted that I had been trying to develop a closer friendship with her—not romantically, but as a friend. She replied, "I’ve always considered you a good friend. I attended a girls' school for my last two years, so I’m more comfortable around girls. That doesn’t mean you’re not my friend." However, I noticed that she engaged freely with both juniors and seniors, including boys. I questioned whether my age played a role in her perceptions. She answered, "It’s more like an older brother and younger brother dynamic." That stung. I thought to myself, "Do I come across as someone dangerous simply because of my age? Am I really that different?" Then a serious incident occurred—she was stalked by a senior who misused a photo of her with malicious intent. I defended her, confronted the guy, got beaten up badly, and ended up bleeding heavily. After that incident, I hoped she might see me in a new light. One day, I called her and suggested having lunch together since I was alone. She responded, "My two friends will be alone if I come with you." In that moment, I recognized that she couldn’t prioritize me, even just for one day. Despite everything, she still viewed me the same way. I finally asked her, "I don’t know what else I can do to bridge the gap between us. I literally fought for you and bled for you, yet you still see me as an outsider. It's exhausting." Her reply was, "I never asked you to help me or fight for me." In reality, I never intended to start a fight. I simply wanted him to delete the photo, which she knew he had. But when he and his friends confronted me, I was attacked without retaliation. When I informed her about the situation, she asked me to do something and let him know that I wasn’t interested. That was the tipping point. I stopped texting her, and now it's been 30 days without any communication from her. Should I reach out again? Did I make a mistake?