Even though Kikyou is Inus first love there is nothing to be held there. You always remember your first long and always long for them but there is a difference. Kikyou is set on revenge and then her time in the Feudal era will be up. Kagome has shown Inu more love and shown him that it is ok to be a half demon to where he has fallen in love with her. What is there to be discussed. Yes he will always run to Kikyou when she is near but other then that His heart and his love is for Kagome. She's his now and Kikyou was his then.