There could be many reasons why he didn't come. Without more context, some possible explanations include:

• He was sick or felt unwell
• Something unexpected came up at work or home
• There was交通拥堵 or an accident on the way
• He got lost or had car trouble
• He forgot or misunderstood the time/place
• He wasn't feeling well enough emotionally/mentally to come
• Something more important/urgent came up unexpectedly
• He decided last minute he didn't want to come for personal reasons

If you have more details about the situation, I could try to narrow down the most likely reason. Otherwise, any of the above could potentially explain why he didn't show up. Let me know if you need any other possible explanations or have additional context to share.