He doesn't want to.
"He" is a third person singular pronoun. The third person singular of "do" is "does."
The correct version is Nullum desiderium :)
"Not enough want to change their self," is not correct grammar. You might say that "not enough people wish to make changes in themselves."
No, "will be had" is not a correct grammar. The correct grammar would be "will have."
i hope that i am the man who you want to marry
No, it is correct grammar, not a correct grammar.
The correct grammar is: "Are those correct?"
"On a train" is correct grammar.
Yes
Yes it is. The sentence "This will be an exciting month for me" is absolutely correct (it needs a period at the end, of course). But "a correct grammar" is not-- you want to ask whether it is "grammatically correct," or to be simpler, ask whether it is "good English."
The correct grammar for this sentence is: "When did you send it?"
no_____If the sentence is You do do that (meaning You are in the habit of doing that) the grammar is perfectly correct and the sentence 'does have correct grammar'.
No, the correct grammar would be "I hate you the way you hate me."