About feeling numb and blank

This is just a rant-- I guess when a person does smth wrong to you, you should get angry, shouldn't you? But I feel numb... I feel nothing at all. All I can do is ask myself, Why did she leave? Am I too much? Or am I not enough? Nothing in between. I was ready to support her, but she decided to run away. Is it really that easy to leave? I just feel a blank space in myself, even though we have not spent much time together. However, I think I should respect her decision to end things and understand her fear of actually committing. She overthinks too much. She had her own anxious thoughts, and I had mine. But we would like to share and listen to each other. I think she could not bear with me. But sometimes I am thinking about taking care of her, no matter how hard it is for her. I would do for her. Actually, the song "I Will" by Mitski really summarizes my thoughts...