I think the feeling of love is implied in the commandment to love God and neighbor. I don't see how we can be motivated to do the actions of love without at least some of this feeling. I think Luke's WANTING to love Him is part of that feeling. "So panteth my soul after Thee" is about a feeling, and when Jesus asks Peter if he loves Him I think a feeling is strongly implied. "If you love Me, feed My sheep" shows that the love comes before the action. "If you love Me you will obey My commandments" also.