My biggest problem through secondary school was that girls would always say i'm attractive, online and to others but never talk to me in person. Only in the last year of school when everyone decided to really have a go at talking to absolutely everyone in our year is when most these girls finally talked to me and soon I realised 75% of the would mention that it was intimidating to talk to me themselves. So just be a guy and talk to them yourself and it'll all be well.