“Faith is the realization of what is hoped for and evidence of things not seen. Because of it the ancients were well attested.
Since we are surrounded by so great a cloud of witnesses, let us rid ourselves of every burden and sin that clings to us and persevere in running the race that lies before us.
“Hold firm and take heart./ Hope in the Lord!” Ps 27:14
I want to add, you can’t change the past, it is over, if you did something wrong, ask forgiveness and apologize to whom you wronged, and forget it. If you are worried about the future, don’t. Jesus said God would take care of the future, and you have no control. Enjoy and be grateful for today and thank God every day for what he has given you and the good people in your life.