Was when she broke up with me

I had made her feel uncared for in a single moment of unfocus after setting up a whole night to show her she was important to me.

I apologised, and tried to talk about it, she asked for space.

Two weeks later she broke up with me.

Until that point she'd never outright acknowledged caring for me, felt the vulnerability was too hard. It was only then that she told me she cared about me and that I was important to her.

All this happened because I answered a phone call from another partner after we'd had sex for the first time. I acknowledged and apologised once I realised. I was sleep deprived and going through my own traumas which at that stage were triggered by phone calls.

This doesn't matter, the hurt had been caused and I lost a romantic relationship with someone I cared deeply about. On the night I tried my hardest to show that I cared, I made her feel secondary and not cared for. And I can't take that back.

We never had a chance to talk about what had happened. When we finally did, she told me that if she had known earlier what I was going through at that time, my pain, she might have held onto her feelings for me but she was hurting and what she does when hurting when something is new is cut those emotions off. She has said she wants to be friends but needs space, because she found breaking up with me difficult. Its been almost 2 weeks with no word. All I can think about is how last time she asked for space she pushed her feelings for me away, and I cant help but think this is just going to end with her not wanting to be friends anymore.

I've come to except the end of our romantic relationship, but the thought of losing her as a friend too scares me even more.

Edit to add: I'm open to pretty much any reflections or perspectives you may have but all I request is compassion and patience if you do choose to comment. I've already beat myself up plenty over what I did and how it impacted her. I don't need more judgement for something which I never meant to do

Further edit: I very much appreciate that everyone here has been able to acknowledge how hurtful what I did was. When I have communicated about this to people in my life, they've mostly been caught up in my feelings and difficulty with the lack of communication around her hurt (she never said anything until I raised and apologised) and been angry at her. I appreciate that this has not been the case here, I hold her no ill feelings and care deeply for her, I don't need others to be angry on my behalf.