(They Long to Be) Close To You was written by
Burt Bacharach (music) and
Hal David (lyrics) in 1963. The first artist to record this song was
Richard Chamberlain, and the second
Dionne Warwick.
The most well known version of this song was recorded by
The Carpenters in 1970.

This is how the melody begins. A unique leap in the interval occurs at the very beginning (where you'd sing "Why do birds").

These are the chords for the first four bars. The song is in D major, and it begins with GΔ7. Then it goes to a sequence of F#9sus-F#9 as if it wants to go to Bm next, but then it goes to F#m7
before going Bm7. This is a clever way to establish uniqueness in the chord changes. It's simple and based on conventional harmony, and yet it's somehow different.
(Lyrics excerpt)
Why do birds suddenly appear
Every time you are near
Just like me, they long to be close to you
Why do stars fall down from the sky
Every time you walk by
Just like me, they long to be close to you