He feels it acutely
He has a queer conception of the proprieties
He is a poor dissembler [dissemble = conceal behind a false appearance]
He is anything but obtuse
He is so ludicrously wrong
He is the most guileless of men
He was so extremely susceptible
He writes uncommonly clever letters
Heaven forbid that I should wound your sensibility
His sense of humor is unquenchable
How amiable you are to say so
How can I tell you how much I have enjoyed it all?
How can I thank you?
How can you be so unjust?
How delightful to meet you
How does the idea appeal to you?
How droll you are!
How extraordinary!
How intensely interesting!
How perfectly delightful!
How utterly abominable
How very agreeable this is!
How very interesting
How very surprising
How well you do it!
However, I should like to hear your views
Human nature interests me very much indeed
I
I admire your foresight
I admit it most gratefully
I agree—at least, I suppose I do
I agree that something ought to be done
I always welcome criticism so long as it is sincere
I am absolutely bewildered
I am afraid I am not familiar enough with the subject
I am afraid I cannot suggest an alternative
I am afraid I've allowed you to tire yourself
I am afraid I must confess my ignorance
I am afraid you will call me a sentimentalist
I am always glad to do anything to please you
I am anxious to discharge the very onerous debt I owe you
I am appealing to your sense of humor
I am at your service
I am bound to secrecy
I am compelled to, unluckily
I am curious to learn what his motive was
I am deeply flattered and grateful
I am delighted to hear you say so
I am dumb with admiration
I am entirely at your disposal