Gr8 sex but no orgasm

Sex has always been ok so I thought that i couldn’t have an orgasm because it wasn’t good. Last night was the best sex I’ve had so far and I even felt like I was reaching a point where I could climax. I kept riding him until I couldn’t move bc it was so good & then it felt like I relieved so much tension from the build up; I thought I achieved an orgasm. I realized nothing came out? So did i not climax? I thought something was supposed to come out?