"May love be like a sunset" means to hope that the love between us is like a sunrise in the sky. "Like" here means "like".
"Later and thicker" means later and richer. "Gradually" here means more and more.
Expand information, hope to love it like a sunset, it will become late and thick. This writing is similar to ancient Chinese and has many advantages:
1, the language is exquisite, enjoyable to read and poetic. Read intoxicated and enjoy.
2. Writing in this way can make the other party feel attentive, but also show their taste and self-cultivation, with a high level of education.
3. Writing in this way can increase mutual affection, add more poetry and sentiment to life, and be more artistic than vernacular Chinese.