2. This is another quote from Wuthering Heights in which indicated that Catherine she loves Heathcliff’s and that it would degraded to marry him now. By saying he’s more myself than I am indicated that everything about him is how she sees herself.
3 I believe that the "Wasteful war" means destructive war, particularly the kind of archaic meaning of "to lay waste." And, the sword of combat (wielded by Mars, the ancient Roman god of war) and fire, he disavows them. They won't be able to cut out or scorch the memory of his beloved.
4 I think it