You know I am very much a fans of your photography so maybe my critiques are biaised and not worth reading but I am a free man so I'll go anyway !
Everything in this picture is just excellent. You just can't get your eyes off of it. Your model is very beautiful and gives her heart out through this laughed out smile. Her pose is very sexy, the location has charm, her choice of swim clothes is romantic. No bad taste there. Colours are just perfect in the pastel tones you've intended them and her skin tone is so well rendered. The light is gorgeous... again, again, nice work
She looks so happy that it makes the viewer wanna smile along with her! I think that's pretty rare to find nowadays when there's so many photos out there that they all blur together... but this one made me stop.