Only my second time

J

So I’ve had sex once with an ex of mine a while ago and I HATED it so I never did it again until recently with my boyfriend and we’ve been together for while so I decided we should do it. The only time I’ve ever orgasmed is when I’m riding him or something like that but having sex doesn’t really feel to good. How can I make it better for myself so I can enjoy it as much as him?