Well do you do reality checks often? If not that could be something you might want to start doing. Are you aware in the dream? In aware I mean do you see things vividly? Are you aware what is going on? Do you see and hear people talking? Do you notice the things going on around you?

If you do in fact notice all of the above that lessens the problem a bit, because if you just keep a look out for things that are odd and are constantly asking yourself if you are dreaming this will most likely cause you to go lucid Reality Checks can also be a great help.

But if you are not aware of anything which I said above that is another problem in itself. You might need to change your mindset before you fall asleep repeating the same thing over and over and over and over. For instance if you said "This Isn't Real" a whole lot of times before you fell asleep right to the point of you falling asleep.

A) You might just get lucky and have a WILD.
B) In your dream you might say "This Isn't Real" bringing about a Lucid Dream.

Don't give up hope your bound to become aware and have a lucid sooner or later.