First of all, songs are usually used to express emotions and inner feelings, so the songs sent to you by your blind date may be regarded as an expression of emotion.
"The Love Song of the Red Dust" sung by Gao An is a song that expresses love emotions, and its lyrics directly express the deep emotions between lovers. From this song, you can feel the passion and firmness of feelings. This may also reflect that your date has a crush on you and wants to develop a deep relationship with you.
However, we also need to note that songs cannot completely replace oral or written expression. If you're confused about your date's intentions or want to get to know each other better, your best option may be to communicate directly with them. Through direct dialogue, you can better understand the other person's meaning, which is also more conducive to the progress of the relationship.