There's 2 main things I'd change, mainly, I'd go back to Valentine's Day 1991, the day my ex from school "proposed", and I'd change my answer from "Ooh I don't really know" to "Yes". Also, I'd skip to a few months later, still in 1991, and knowing what I do now, I'd pass at least GCSE Maths even if history repeated and I failed everything else because about 5 years later I resat English at College and got an A.