It's easy to have thoughts like, "I'm not good enough," or "I'm not worth it." It's also easy to fall into a pattern of seeing the negative in those around us as well. Even with our loved ones, we may hold feelings of resentment or anger from time to time. Loving-kindness meditation helps us to strengthen our awareness, acceptance, and compassion towards ourselves and others.
Having a heart of kindness is not just about the people you like or love, but also extends to those who are difficult for us as well. As you might realize through practice, it's often easier to cultivate kindness for your loved ones than for the challenging people in your life. But through practice, you can learn to extend that loving-kindness to everyone.