I had sex with my child hood babysitter while she was engaged [MF]

So back story when I was growing up I had a babysitter when I was around 7-8 and she was 16when my parents would go away for the weekend. We lived in the same town and such. She moved away for college and I hadn’t seen or even heard of her for awhile. She moved back to my hometown a few years ago and we ran into each other at a mutual friends bbq. Long story short we caught up and started hanging around more and more in the same friends circle, she got engaged to a guy I knew and such.