Perhaps the reason we are unable to love is that we yearn to be loved, that is, we demand something (love) from our partner instead of delivering ourselves up to him demand-free and asking of nothing but his company.
People who drink to drown their sorrows should be told that sorrow knows how to swim.
We were given: Two hands to hold. Two legs to walk. Two eyes to see. Two ears to listen. But why only one heart? Because the other was given to someone else. For us to find.