He didn’t respond to the first message for a reason.
He may not have liked what you had to say in your message or he may have taken a look at your online dating profile and felt a lack of connection to you.
If you have been sending messages and not getting responses to them, you may be seriously wondering about how long it takes to get responses.
If you are noticing that you are yet to get responses to your messages, it may be because your messages aren’t compelling enough to make people want to respond to them.