My past and my guilt

Hi umm so this my story. When i was 12, a younger friend of mine (10 or 11) introduced me to porn... This caused me to start experimenting with my then bff who was the same age as me. We did things... At times she was reluctant but i convinced her to do so. She would seem upset or annoyed after that. And there are times she wants is too and is okay with it. This happened several times...

When i was 13, i moved to a different city and we both lost contact. Since then till now that im 19, i feel so shameful and guilty when i look back at what i did and what i put her through. I shouldn't have done that cuz that was unforgivable.

Then one day when i was 15, we met. I apologised for what i did and she said okay. We shook hands and continued to talk normally. She did seem a bit weirded out when i i brought it up to say sorry. The thing is she has mild autism that causes her to be really slow in study wise and that lead her to be a bit fidgety and awkward during conversations. When i knew of this i felt even more guilty because i wasnt sure if the uneasiness she potrayed that day was due to thr trauma from what i did or just her being her awkward self. And now i feel terrified... Because i know and i admit what i did was wrong but back then i didnt know anything about the right and wrong in situations like this. I thought it was a normal thing to do...