This whole song is a conversation with his father about his girl and indeering love for her as she seems battles her way through the trenches of depression. The Daddy references at the end are him talking to his father, he is at his wits end because his "love's [his girl] is a mess." He does not think he can help, so he earnestly asks his father for the strength and wisdom to help him get through to her becaus ehe loves her and hates to see her so unbearably miserable.
This whole song is a conversation with his father about his girl and indeering love for her as she seems battles her way through the trenches of depression. The Daddy references at the end are him talking to his father, he is at his wits end because his "love's [his girl] is a mess." He does not think he can help, so he earnestly asks his father for the strength and wisdom to help him get through to her becaus ehe loves her and hates to see her so unbearably miserable.