Help! Tips for being on top

So me and my boyfriend have been having sex for about a year now and I hate how I always feel like he's doing all the work. I've tried to ride him a couple times but my hips pop every time i thrust and then we both just laugh. I really want to make HIM cum for once. I want to do the work. Whenever I'm on top i just can't get a good rythem going, or should I hop up and down like the girls in the pornos ?? Help! Any tips?