I miss my ex😪

I know I'm only young (15) but me and my ex were together 8 months and before that we had been like 'bestest friends' like no joke. We do karate togetehr so I have to see him every week and tbh it's awful like all I want to do it cuddle him and kiss him. The break up is fairly new, a week or so. I would get back with him as he wants too but my parents are against it as they know what he's done to me, how he's hurt me. My friends hate him and I just don't know. Please give me some pointers?