wanting (adjective) (formal): wanting (in something) not having enough of something. Oxford Learners Dictionaries
wanting (adjective): not having something; lacking. Cambridge Dictionary
In fairly rare, formal English, "to be wanting" can mean "to be lacking", "to be deficient". English Language and Use
it seems wanting a formal word, but I noticed some people use it in informal English, the following is an example from a social website:
I'm really wanting to sit and watch a movie with my girlfriend. Can anyone recommend a good girlfriend?
First Question, Is it common to use wanting in informal English?
Second, what is the meaning of "I'm really wanting" in the above example? Does it mean "I really want" or "I'm really lacking"?