Joel,

even though there are more ways to read the Song of Salomon (some say the jews / christians couldn’t put up with the concept of erotical love which is described there and therefore ‘spiritualized’ it), I agree with you that the Bible contains many passages about God’s relationship to us. However, evangelicals shifted this to the personal relationship with ‘Jesus’. Jesus invited his desciples to pray: when you pray than say: ‘our father in heaven…’ Jesus had a very intimate relationship with God and invites his desciples to have the same. He calls God ‘Abba’ - an intimate expression of his (and his desciples) intimate relationship with God.
However out of some reason evangelicals shifted this to Jesus with the result of praying to Jesus instead to God the father and come up with weird concepts like invite him into someone’s heart etc. There are only two or three examples in the Bible where people prayed to Jesus (Stephanus before he died; the last verse in relevation..), however most evangelicals pray to Jesus rather to the one that Jesus asked them to pray to.