Can’t orgasm. Help!

So me and my partner (of almost a year) are super in love, healthy sex life and very tuned in to what each other likes sexually. I’ve never had an orgasm, I’ve only felt like I’ve come close to having one and I only feel like this when my partner and I have sex, however every time something feels really good I have to stop and pull away because it feels like it’s too intense. I don’t know why it feels like this but it always feels too intense to actually continue ☹️ can someone please give me some advice or possible answers?