@Teeesha the ml doesn't want Liz to go through the same he** he had been through cause that will hurt the fl .
He doesn't think the fl is weak . Cause after all she is a duke herself and had amazing achievements . It's just the ml doesn't know how to express his feelings. He is dumb .
And in the last chapters liz is having character development they are teaching her how using people you love to fulfill your arrogant revenge can break the people you care about. So this should solve your questions. See you around.