It will never increase attraction. If she likes you before you say that, she will be hurt, and leave. or she will be hurt and pick up the attention that she is giving you out of desperation. This is what the "Master DJ's" usually mistake as increased attraction. The only thing that was increased was the expression of that attraction. which equals "Ego boost", which makes us feel good and macho. That's it. if she doesn't like you, the LJBF will make her feel either relieved, or she will want the attention of you liking her and change her actions until she has your attention to feed her ego. Just be real man.