I'm not sure if it's the most romantic, but it's one of my all time favorites and it does pull at your heartstrings. "Sometimes When We Touch," by Dan Hill with Rique Franks (Best Version).

Sometimes When We Touch

Roxette - It Must Have Been Love

These are 4 of my favorite love songs, I still have enough, but they're enough for now 

Asian: That's how we ended up - Giriboy (though it's more like a breakup song), an actual love song is me before you by Paul Kim

Non-Asian: Dark Paradise - Lana Del Rey