How can my boyfriend reply humorously when he says he is lonely?

1. "Let me tell you a joke to make you forget the feeling of loneliness for a while."

2. "Don't be sad. Your loneliness is only temporary. I'm here."

3. "Do you know that loneliness is like a shadow, and sometimes you need to come out by yourself?"

4. "Then let's do something interesting together to make your mood better."