This statement highlights a common issue in modern relationships – inconsistent communication behavior. It advises against trusting someone who frequently takes hours to respond to your messages but appears to be constantly engaged with their phone when you're physically together.
The inconsistency in response times can raise questions about the sincerity and priority of the relationship. It may suggest that the person is not giving your messages the attention they deserve or that they are not fully present when communicating through texts.
In essence, this quote serves as a reminder to pay attention to how someone's actions align with their words in a relationship. Trust is built on consistent and honest communication, and when there's a noticeable disparity in behavior, it can be a red flag that warrants further discussion and understanding in the relationship.