I love mankind, it’s people I can’t stand.
― Charles M. Schulz
Yes, it can often be easier to have a generalized feeling of love for others than to put this love into practice towards someone who we feel is doing his best to hurt or annoy us.
One of my favorite quotes from A Course in Miracles is
Every loving thought is true. Everything else is an appeal for healing and help, regardless of the form it takes.
The marvelous thing about this is that if we can accept it and respond in a positive and loving way then we will have helped the other person as well as ourself. We may even wish to re-interpret the whole incident and be grateful to the other for his true loving thought in offering the opportunity for this increase in love for both of us!
Receiving love from another person is wonderful, but the true way to happiness, and much more under our control, is to give love.
See also this article by Jafree Ozwald: