I still get a little giddy when I pull a slim volume of love poems off the shelf — there’s something about paper and ink that makes the feelings inside them feel immediate. If I had to start someone off, I’d reach for 'The Norton Anthology of Poetry' because it’s one of those big, reliable collections that gathers everything from Shakespeare’s tender sonnets to modern, messy love poems. It’s not a single-theme book, but its scope means you can explore courtly love, metaphysical arguments, romantic passion, and contemporary heartbreak without switching volumes.
For a concentrated blast of classic English-language love poetry, I love recommending 'The Oxford Book of English Verse' — it's heavy on the centuries and splendid for tracing how lovers spoke to one another across eras. And for a different kind of heat, I always keep a translation like 'Twenty Love Poems and a Song of Despair' by Pablo Neruda nearby; even in English it hits like a late-night confession.
If you want something focused on form, try 'The Penguin Book of the Sonnet' to see how the sonnet has been used to trap, confess, and celebrate love. Between these picks you get formal skill, raw emotion, and an embarrassment of riches to keep your bedside table interesting.