Sometimes guys don't understand why inviting a woman over to your place to watch a movie is a much better idea than asking her out to watching a movie at the theater; which is understandable when you are looking at these two particular choices from a logical point of view of which one is better instead of the emotional point of view of which guy sounds better.
As a man, if given the choice between a movie at home or a door and a movie at a theater given that everything is equal the movie theater sounds better because odds are its going to be on a bigger screen, with a better sound system, and a newer movie that you may not have seen yet.
However, most women don't go out with a guy based on where he is taking her rather she goes out with him based on what he has to offer.
When you ask a woman out to the movies at a theater you are essentially saying; "I don't really have anything to offer you so hopefully the movie will be entertaining enough for you to like me."
Yet, the man who just invites her over to watch a movie with him at his place is saying; "I am entertaining enough by my own self and don't need to prove anything to you."
Not to mention the fact that there is the whole time aspect of it as well.
Generally, movie dates at the theater are planned and give her time to think about it and whereas a movie at the house is a now type of thing which means she needs to give answer quickly and being that she doesn't want to miss out on anything the answer unless she doesn't like you or has something better to do is going to be yes.
In the end, if you really want to see a movie at the theater and cant go by yourself invite some of your friends along and then invite her to watch a movie or to do something afterward.