Add a faint vocal chop—high-pitched and heavily reversed.
Layer in "vinyl crackle" or "rain" sound effects to give it that vintage, lo-fi warmth. free_sad_xxxtentacion_type_beat_hoping_love_sad...
Remove the 808s and heavy kicks. Keep just the hi-hats and the guitar loop to leave room for "sad" vocals. Add a faint vocal chop—high-pitched and heavily reversed
Fade out the drums first, then the melody, leaving only the rain. then the melody