In chapter 30 Henry tells Mary about his love for Fanny, and during their conversation they say the following:

“My dearest Henry,” cried Mary, stopping short, and smiling in his face, “how glad I am to see you so much in love! It quite delights me. But what will Mrs. Rushworth and Julia say?”

“I care neither what they say nor what they feel. They will now see what sort of woman it is that can attach me, that can attach a man of sense. I wish the discovery may do them any good. And they will now see their cousin treated as she ought to be, and I wish they may be heartily ashamed of their own abominable neglect and unkindness. They will be angry,” he added, after a moment’s silence, and in a cooler tone; “Mrs. Rushworth will be very angry. It will be a bitter pill to her; that is, like other bitter pills, it will have two moments’ ill flavour, and then be swallowed and forgotten; for I am not such a coxcomb as to suppose her feelings more lasting than other women’s, though I was the object of them. Yes, Mary, my Fanny will feel a difference indeed: a daily, hourly difference, in the behaviour of every being who approaches her; and it will be the completion of my happiness to know that I am the doer of it, that I am the person to give the consequence so justly her due. Now she is dependent, helpless, friendless, neglected, forgotten.”

For some reason he sounds a little bitter to me, as if he wants to get back at Maria for marrying Mr. Rushworth instead of falling for him in the end.

I also somehow have the feeling that he is a man who enjoys the hunt, but is bored with his prey as soon as he's caught it. What I mean to say is that I think he enjoys courting Fanny, but I have this eerie feeling that if Fanny should give in and say yes, he would get bored pretty soon and need to find the next game or the next "prey" to hunt.