Jesus tells her:
Write for the benefit of religious souls that it delights Me to come to their hearts in Holy Communion. But if there is anyone else in such a heart, I cannot bear it and quickly leave that heart, taking with Me all the gifts and graces I have prepared for the soul. And the soul does not even notice My going. After some time, inner emptiness and dissatisfaction will come to her attention. Oh, if only she would turn to Me then, Would help her to cleanse her heart, and I would fulfill everything in her soul; but without her knowledge and consent, I cannot be the Master of her heart. (Diary #1683)

Fr. Jordi's reflection:
The Lord's command that we love God and one another is at the heart of the Gospel. He came to teach us to love all with the love that He gives us. His love, then, must be at the center of our hearts and radiate from us to all.  The more we are united to Jesus, the more that His love in us reaches others (Cf Jn 17). This union in Christ's love builds the mystical body of Christ. The saints are our best example. See

But if we make others the center instead of Jesus, then our love is not authentic, it is not the love of Christ. Any love that does not help us to love God more, any love that conflicts with our vocation, is not true love. Such love displaces Him from being on the throne of our hearts.