If it's loneliness/depression you may not be seeing a face because there is no person in your life who is associated with the safe/loved feeling you describe, (after all that would be the whole point of the dream) And the frustration could be an artifact of the same emotions that create the dream in the first place.
Oh, the long hair, it could just be that long hair is something you find attractive, (that is, of course, assuming the dream is about romantic love, which is a bit of a leap from what I know, but seems to make sense in light of what you've said and the dreams of mine I mentioned earlier)
Going out on a limb, I would say the best way to make the dream go away is to fill the need it expresses, (which is, I well know, much easier said than done)