1. Sending sunset pictures shows that this girl is interested in you, suggesting that she likes you.
2. If you receive a sunset photo from a girl in your life, you must understand at the first time that she is hinting at you, not expressing that the sunset is beautiful, but just asking you to say that I miss you, too.
3. There was a poem that said: Look at the sky at dusk, look at the clouds, walk and miss you, sit and miss you. I have been watching the clouds from morning till night. I miss you when I walk, but I miss you when I sit.
This poem is a confession poem, implying that the other person likes you.
5. So if you meet a person who combines the above and sunset photos in your life, it means that this girl is thinking of you and loves you.
6. If you like each other, you might as well say I miss you, too.