Scripture and Catholic teaching tells us that their are three virtues which embrace the first commandment; faith, hope and charity.
"I am the Lord your God, you shall have no strange gods before me." This reminds us that we have an obligation to nourish our faith. We also rely on His promises (hope), and respond in charity (love) for what He has done for us, especially in how we treat others.
There is an entire catechism lesson in just that paragraph, but I'd like to focus on 'charity.
The word charity also means love. When someone acts with charity, it means they are acting with love, reflecting God's mercy and compassion to others. For example, if you have been hurt, responding by reaching out in love to another. Offering help when needed, prayers, and kindness. In doing this, the mercy of God is reflected.
The Holy Spirit should be called upon to direct our acts of love/charity. We do not always know what someone truly needs and being open to the Spirit's direction can guide us.
Love means doing what is holy and right, no matter what the circumstances. At times, it can mean going against our own desires to defend ourselves. Other times, it might mean taking a risk and even being rejected. That is why we need a good spiritual director to help us work through all the details of our interactions.
On the other hand, there are moments when the Holy Spirit shows us very directly what needs should be met (feeding the hungry, helping the poor, reaching out to a friend in need). We are then called to respond accordingly.
I think that part of the challenge, is to redefine love. Love is not what the world calls it, a feel-good emotion, but it is a higher call to holiness. It is a self-giving, often sacrificing calling.
Please know, dear reader, that as I write this, I am praying for, and loving each one of you. In Christ's love.