Not all love songs are romantic. Not all love songs are even happy. It all depends on your definition of the term. For every “My Girl” or “Your Song,” there’s at least one track with a nuanced take on the darker, more complicated sides of love — the drama of a long-term relationship, the fear of losing a partner, the void left in love’s wake. Many of those songs fall under the admittedly broad umbrella of “alt-rock.” So to mark Valentine’s Day, we decided to gather 50 of our favorite “love songs” in the genre — both conventional and otherwise. Throughout this list, you’ll find lines about blooming romance and marital bliss. You’ll also find nods to drug addiction and car crashes. There’s something for everyone. – Ryan Reed 50. that dog. – “I’m Gonna See You” You take the good, you tak...