Equipaje literally means "luggage" or "baggage." While it's a common word, its use in this romantic context is quite unique and metaphorical.
In the song, the lyrics say, "Y abrí el equipaje que guardé en mi corazón" (And I opened the luggage I kept in my heart). Here, "equipaje" represents the emotional baggage or the collection of feelings and hopes that the singer had kept hidden away, waiting for the right person. This metaphorical use makes the word stand out and adds a poetic depth to the expression of love.
This is a simple, grateful love song. The singer describes feeling forgotten by love until this person arrived, and how one honest look and a few true words woke up a hope he thought he had given up on.
The chorus turns that gratitude into a blessing: may God always watch over this love, and may it keep growing the longer they are together. It is not a song about grand romantic gestures, it is about quiet, everyday thankfulness for finally being with someone who taught him what real love is worth.