Please please help me find this poem

Ive been searching for this poem for weeks. i hope someone help, thanks in advance. these are the only words i know......

love is like a potion?
to which there is no magic potion?
runs down or deep down heart stream?
but the greatest love?
the greatest fall is when you fall in love?

sorry there isnt much to work with but i hope this is enough. thanks you

Love is a funny thing shaped like a lizard,
run down your heart strings and tickle your gizzard,
you may fall from a mountain, you may fall from above ,
but the greatest fall is when you fall in love