Obligations I Cannot Fulfill

Life seems to involve an increasing set of obligations that I cannot fulfill.  Family and friendships and love mount the obligations even higher.

I've been reading Hans Urs von Balthasar's Only Love Is Credible (What a great name!  What a great title!), and he confirms this perception.

"The moment I claim to have 'understood' the love that another person has for me, i.e., either explaining it on the basis of the laws of human nature or considering myself entitled to it because of my inherent qualities, I have once and for all undermined and falsified that love and thereby cut off the possibility of reciprocation. Genuine love is always inconceivable, and only thus is it a gift," p. 52, n.1;

"When man encounters the love of God in Christ, not only does he experience what genuine love is, but he is also confronted with the undeniable fact that he, a selfish sinner, does not possess true love. He experiences two things at once: the finitude of the 
creature's love and its sinful frigidity," p. 61;

and today,
"But at a deeper level, man is aware of his heart's paralysis, fallenness, and frigidity, his incapacity to meet the demand of any law of love, no matter how generally postulated.  He simply cannot summon up enough courage for it.  And in any event he would not presume to believe in such a fulfillment of existence.  He finds such a lack of strength in himself that he thinks he must complain to authorities higher than his own heart, a heart that to be sure could always go a few steps further than it actually does, but could never (it feels quite certain about this) make the entire journey—all the more so insofar as no one can really imagine where this path may in fact lead.  The stages of the journey are impossible to map out; they trail off immediately into the impenetrable night," p. 67.

It's comforting to know I'm not the only one to feel this way.  Now, what to do about it?