Every First Friday of the month reminds us of the intense love that Jesus has for each of us. He revealed this love to St Margaret Mary under the aspect of his Sacred Heart. The devotion to the Sacred Heart of Jesus is all about love.
Why is it so hard at times to really believe that God loves us? Perhaps it could come from a lack of faith, or perhaps from a sense of unworthiness, a sense of self-hatred or rejection. Other people might reject us, but God never does. Other people may not be able to love us, but God always does. If we have experienced rejection or a lack of love, it's easy to transfer that into our feelings, as if God looks at us like that too.
Look at the crucifix, and recall that nails didn't fasten Jesus to the cross, but his love did. St Paul says that Christ died for us while we were still sinners. He didn't die for us because we were good, we weren't. But accepting the love that flows from his cross makes us good. The next time somebody insults or disparages you, send that up to Jesus on the cross and ask him to transform it into love. He will.