Wow — this question really lights up my playlist brain. I can think of a handful of songs where the lyrics literally equate self-sacrifice with love, not just romantically but in a protective, total way. For example, Prince’s 'I Would Die 4 U' says exactly that kind of thing in plain language: the refrain is a direct declaration that giving up your life, or being willing to, is the ultimate expression of devotion. That bluntness is echoed in modern R&B too — The Weeknd’s 'Die For You' has repeated lines about being willing to die for someone, turning sacrifice into the core proof of feeling.
Then there are more dramatic, narrative-driven examples. The musical ballad 'I'd Give My Life For You' from 'Miss Saigon' is literally about a parent’s willingness to trade their own life for their child’s safety; it’s theatrical, specific, and painfully explicit about sacrifice as love. On a subtler plane, 'Bridge Over Troubled Water' by Simon & Garfunkel captures the same idea with the line about laying oneself down — it’s poetic but the intention is identical: love equals taking on hardship for someone else. Meat Loaf’s 'I'd Do Anything for Love (But I Won't Do That)' also frames love as an almost limitless willingness to give or suffer for the other person, even if the song plays with boundaries.
I love how these examples span genres and formats — pop, soul, musical theatre, classic folk-rock — because the idea that love is proven through sacrifice is such a common human story. Some songs are literal and stark, others are metaphorical and tender, but all of them put self-sacrifice front and center as the currency of love. Personally, these tracks hit me hardest on late-night drives; they turn the abstract idea of devotion into something you can almost touch.