Not so much.
Your first mistake was thinking that he could resist the proposition: an endless supply of sub-tropical freaky without all the messiness of feelings and obligations. A man knows in the back of his mind that you'll eventually either want more or want to move on. He's just hoping it doesn't all go down in teary-eyed, crying-out-loud, horrible Twitter-ranting flames-- but this is after he's had an orgasm.
Your grandmother knew what she was talking about. Few men will buy the cow when the milk's been free and plentiful (and those few wear a Scarlet S, for "sucker").
Doesn't mean he sees you only as a walking repository. Men often do form emotional attachments to their BFFs (Best Fucking Friend), but for a man it's almost a matter of principle; "no strings attached" is what was originally agreed upon... nothing more.
Friends with benefits should never be viewed as a temp-to-hire situation. It's not about him respecting you or wanting something more out of life. With these types of arrangements you leave the way you came (no pun intended).