Complex sentence: Lois views Clark as a friend and respects him as a journalist, but regards him as a loner who has difficulty letting people get close to him, and displays no existing knowledge of his dual identity.
Split into simpler sentences: Lois views Clark as a friend and respects him as a journalist, but regards him as a loner who has difficulty letting people get close to him. Lois also displays no existing knowledge of his dual identity.