3 month rule

If a 29 y/o guy at 6 weeks (counting from since first date) says he's not ready to commit yet/not yet ready for exclusivity and wants to explore but loves spending time with you, isn't really sure when he will be ready to commit but next girl he dates he will be all in and most likely will marry her. Do you think it's possible/common/do you know anyone who's experienced this that by about 12 weeks in he is ready to choose you? Of course this goes without saying that you and him continue to really open up and have great quality time together, great convos, great sex and just overall intimate and amazing connection. I know most guys who say they aren't ready for commitment but do really like you kind of need to get it out of their system before settling down. His actions show he has real feelings for me but his words and his brain are saying date around since you just moved to a new city.