AITK for blocking a close friend after developing feelings for her and not knowing how to handle it?

So, I (24M) have been close friends with this girl (23F) for a while. We've known each other for months, shared a lot of deep conversations, and bonded over similar interests. Recently, I started developing feelings for her that I couldn’t shake off.

I asked her if she’d consider being in a relationship with me, and she said yes. However, she mentioned she didn’t want to do long-distance, so I told her I had exams until April and planned to move to her city afterward. She said she was okay with that and even mentioned staying single until then so we could be in a relationship.

But over the last 15 days, every time we talked, she kept bringing up this guy she met through a mutual friend. She talked about him constantly, even though she knew about my feelings for her. I tried to stay calm and supportive, thinking maybe I was overreacting, but it started to really get to me.

Two weeks ago, I went to her city (400 km away) to meet her. We had planned to meet for two days, but she cancelled last-minute, saying she got scolded by her parents and wanted to stay with her female friend. I was disappointed but still tried to make the most of the trip. On the 3rd day, she came to the train station to say goodbye.

I brought her flowers and a handwritten letter (she used to love my letters), but this time, she seemed indifferent, saying it was “up to me” if I wanted to give it to her. I thought she’d stay until my train arrived, but she wanted to leave after 10 minutes because her friend was unhappy that she left.

During our brief conversation, she brought up that guy again and told me they were likely going to start dating. This completely threw me off. I asked her what she saw in him, and her answer was that he had a “really pretty cat.” (For context, I have four cats.)

I texted her a long message explaining how my feelings were cluttering my mind and suggested we stop talking to each other. Then I blocked her. But soon after, I started feeling so guilty that I couldn’t stop myself from calling her. She said she was okay, but I also sent her a text apologizing for being immature, asking her to understand that this is the first time I’ve ever had strong feelings for someone.

She responded by saying she’s not the problem—I am the problem—and that she doesn’t want to date me anymore but would like to stay friends.

I feel stuck. I don’t know if I should ask her out again, but I’m also struggling with the fact that she doesn’t feel the same guilt as I do. I feel like she wronged me in many ways, but she doesn’t acknowledge that.

AITA for how I handled this? And is there any way to make her see things differently?