In an article in the New Dictionary of Biblical Theology, D.A. Carson warns against ‘word-based reductionism’:-

‘When Amnon incestuously rapes his half-sister Tamar (2 Sam. 13, LXX), twice we are told that he ‘loved’ her, once with agapaō and once with phileō. It is hard to see how this love differs from erōs, acquisitive and sexual love (though the word erōs is never found in the Bible). Twice John tells us that the Father ‘loves’ the Son, once using agapaō (John 3:35), once using phileō (John 5:20), and it is difficult to detect any difference in meaning.