HELP!!! I can't Orgasm

ive been masturbating incressingly and finally found what works. or close to it becuase I can't let it all out. I feel the pleasure it builds up and I get tense and it increases but then it just goes away. Like I was laying there with my back arched my head thrown back one second then the feeling passes and I'm just laying there like I'm at the beach looking at clouds thinking.