How can two people do so well and at the same time so badly to each other? A friendship so complex that their biggest problem was that none of them had enough maturity and this ended up shaking their friendship throughout the series as much as they loved each other very much, it was a turbulent path but they matured little by little during the series and finally managed to keep their friendship healthy. #gossipgirl #serenaandblair #blairwaldorf #serenavanderwoodsen #viral