There could be one of many reasons such as he is scared, not ready for such a commitment, changed his mind, taking some time to think - but he is the only one who knows for sure why he has done this. Give him some time and space, don't pressure or pester him concerning this, allow him to come to you when he is ready as he may just need some thinking time - this is a big step for a man allow them breathing room.
Chat with our AI personalities