Confused! Breastfeeding ://

So my little one keeps feeding all night. I used to pull out my nipple when I thought he was asleep but he’d wake up. Today I pulled out my nipple and he is still sleeping. Now I feel bad. What if he was hungry and tired and now he’s just sleeping because he’s too tired to be up😭 I’m so confused. My mama says he has formed a habit of sucking and sleeping and I should try to break that habit slowly. I’m not sure how will I know if he’s ever full. He doesn’t take a pacifier! I’ve tried a lotttt😭someone give me some advicewe