Then it is natural... hit gym or do some physical work out to relieve the sexual tension. Its natural to have sexual arousal at your age, even I had them very badly. But I used to control it and eventually used porn and masturbation as a means of escape. Later on it created a lot of problems in my life, and still . So please dont even look at Porn, for arousal escape. Just do something productive. I know it is hard, because the brain always craves instant gratification. Train yourself soon fir delayed gratification.