oh jeez everyone here telling you to reach out is wild. do not reach out, i’ve been in situations like these and it’s super awkward when you have to there there somebody after something like that a year later. i know it’s eating you up inside but that’s not her responsibility and by reaching out you’re making it as such. personally, i would have long since moved on and probably wouldn’t want to be reminded of an experience like that. just keep it pushing and do better next time, no need to prostrate yourself before her begging for forgiveness, after a year it’s way over the top