Orgasm

So I don’t think I’ve ever actually orgasmed/came. I know one time I was masturbating and I felt like a fish but I couldn’t tell if I had orgasmed or if I had just peed. But it didn’t seem like pee. Every post I’ve seen says that when you orgasm, you know, but I don’t know. And I feel bad because every time my boyfriend and I have sex I feel like I get super close but then I have to stop because it feels like too much. And he asks me if I came or not and I didn’t but I really want to. So how can I help myself experience an orgasm?