What happens when a man doesn't take the initiative to call his lover and send a message?

There may be many reasons why men don't take the initiative to call or send messages to their lovers:

1. His busyness or distraction: When a man has work, family or personal affairs to deal with, he may feel stressed and distracted and can't keep in touch with his lover often.

2. Time alone: Sometimes, even if a man loves a person very much, he may need some time alone to deal with his emotions or affairs. This doesn't necessarily mean that he doesn't care about his lover or has lost interest in her.

3. Thinking about the relationship: Sometimes, when a man starts thinking about the relationship with his lover, he may become silent. This may be that he is thinking about the future between them, or that he is thinking about how to better support his lover.

4. Don't know how to love: If a man doesn't know how to love others, or is immature, he may encounter difficulties in communication and be afraid to disturb his lover.

5. Existence of survival or health problems: If a man has survival or health problems, he may temporarily be unable to contact his lover.

6. External factors: External factors such as parents' disagreement may also affect his initiative to contact his lover.

Please note that the above are only possible reasons, and everyone's situation is unique. If the lover is troubled by this, the best way is to communicate directly with the man and understand his real thoughts and feelings.