Disastrous date

The date itself didn't actually go badly in fact I thought it had gone well, very well.

We were coming to the end of our date waiting at the train station awaiting the last train home. I was rubbing my fingers along her legs and slowly worked my way up the inside of her thigh, rubbing her gently, I eased towards her pussy with my strokes, getting closer until I was under her skirt, I teased closer when she started to breath deeply, she let out some gasps and I started to touch her more, rubbing my fingers over her, I worked her harder and harder, she began to pulse, encouraging me to do it more, it built up until she was breathing deeply, she kept looking up to make sure no one was coming before closing her eyes and letting out more gulps, she began to rock with my strokes and before I knew it she orgasmed and then we kissed, she thanked me for the orgasm, we kissed two more times and suggested I get my STI test ASAP so we could fuck properly. The train soon turned up and people started to arrive. There weren't many people on the train so I played more with her on the train home but there was a bit too much company to generate any more full orgasms, I suspect I came close based on here noises though.

As we went her separate ways, I left thinking finally a woman who I'm going to have amazing fun with. She texted me later to say she wished I had had my fingers inside her. She even told me the next day she'd dreamed about me fucking her.

However a day or two later she said I'd bruised her and this week she now says I've damaged her nerve endings on her clit. This has destroyed our relationship, what can I do?

I've apologised profusely but she just wants to be friends, this has never happened to me before!