If we just worry about the big picture, we are powerless. So my secret is to start right away doing whatever little work I can do. I try to give joy to one person in the morning, and remove the suffering of one person in the afternoon. If you and your friends do not despise the small work, a million people will remove a lot of suffering.
Love isn't a state of perfect caring. It is an active noun like "struggle". To love someone is to strive to accept that person exactly the way he or she is, right here and now.