“Some worry endlessly over missions that were missed, or marriages that did not turn out, or babies that did not arrive, or children that seem lost, or dreams unfulfilled, or because age limits what they can do. I do not think it pleases the Lord when we worry because we think we never do enough or that what we do is never good enough.”
We can always try. Each try we give should be our best effort, our whole self. For the matter of saying that it’s too hard, there’s a scripture In the New Testament that brings the answer into sharp focus. As stated in 1 Corinthians 10:13, “…God is faithful, who will not suffer you to be tempted above that ye are able; but will with the temptation also make a way to escape, that ye may be able to bear it.”
Confession of sins to God, to ourselves, and to those we may have wronged, will help. It’s hard to do sometimes, but it is the first step of repentance and becoming whole once more. Just push yourself in each of your righteous endeavors. Push yourself to be rid of bad habits, to take on good ones. Push yourself to be a better son, daughter, sibling, parent, etc. Push yourself to be all that God knows you can be, and to the greatest of your potential. Be patient with yourself, but don't settle for anything less than your very best.
You can learn more at Mormon.org/chat by chatting live with real missionaries of the Church of Jesus Christ of Latter-day Saints!