Strawberry, You are right in sensing that “mutual love” has an important role somehow in the Eucharistic Celebration. I am not a theologian nor an exegete but will try my best to explain my thoughts.
The formula for “love” to be “mutual” (in our case at hand) requires the presence of the Creator’s love and the creature’s love. In this formula, the Creator’s love is A GIVEN because it is present from the outset, independently of the creature’s love. To complete the formula for mutual love, the creature has to give his/her consent. Because of freewill, the creature may or may not do this.
In the Greek text and English translation of the Synoptic Gospels (Mt, Mk, Lk), the Lord’s eucharistic word “Take. Eat. Drink.” are in the imperative case, i.e. these verbs are commands. But since the Lord respects our freewill, He will not impose Himself nor His gifts on us. In the sacrificial act however, taking and partaking of the sacrificial meal is an important part of the event.
If we say YES to the Lord and His gifts, we complete the formula. In this case, it’s well and good because the Lord’s sacrifice would not have been in vain.
If we say NO, then mutual love is absent because only the Lord’s love is present in the formula.
What is the effect of this absence of mutual love? Jn 6:53ff gives us the answer: “So Jesus said to them, 'Very truly, I tell you, unless you eat the flesh of the Son of Man and drink his blood, you have no life in you. Those who eat my flesh and drink my blood have eternal life…”.
Bottom line: The presence of mutual love is NOT a pre-condition for the continued presence of Our Lord’s body and blood in the Eucharist. However, it IS a pre-condition for the creature’s union with his Creator and the resultant possession of eternal life.