I had a contrasting experience today that lead me to a revelation: There is only one thing you can ever doubt and that is LoA itself. When you doubt that your guy/girl will come back, it's doubt in LoA, because you don't believe that you can really have everything you want. So, you can train yourself into believing that you can have your specific person, but the moment a new desire is born you have to train yourself again in the mindset that it is possible for you. So, the best thing you can do, when doubts come up is to strenghten your faith in LoA. Until you really believe that it is real, there isn't a point in focusing on your specific person, because you will always fall back in doubtful thoughts that will hold you back. Take the time to fully train yourself into believing in it, experiment with it and when you are fully convinced, it's a piece of cake to attract a specific person.
"Self-abandonment. That is the secret. We have to abandon ourselves to the state, in our love for the state, and in so doing live the life of the state and no more our present state. And to make the state alive, one must become it."
Neville Goddard ~ The Law and the Promise