Don’t want to co sleep anymore, how to convince my partner he’ll be fine

I’ve been co sleeping with my son pretty much since the day he was born. He did sleep in his bassinet here and there but he really didn’t like it. He’s turning one soon and he just keeps growing and would eventually need his own space. My partner is scared of our son to sleep alone but I told him about the breathable mattresses that are worth getting. Our son does sleep crazy but which baby doesn’t? How can I convince him that he needs his own crib? We’re first time parents so I’m sure some of you can understand. Any advice? PLEASE NO RUDE COMMENTS!