Complex sentence: Looking on the bright side of life for Charlie Brown is always difficult usually, his most loyal friend, Linus always has advice fpr him especially during the period in which he admired this Little Red Haired Girl.
Split into simpler sentences: Looking on the bright side of life for Charlie Brown is always difficult. Usually his most loyal friend, Linus always has advice for him especially during the period in which he admired this Little Red Haired Girl.