I cannot answer for Erin and Steve, but as I see it, there is no contradiction. In his post, Steve is in the context of subjective reality. I guess Erin is in the context of objective reality.
In objective reality, she has her own intentions and you cannot force her. In subjective reality, she's a part of your consciousness. That she rejects you means that some part of yourself rejects you. That's just two different manners to look at the same thing.
If one part of yourself rejects you, you'll have negative, rejecting thoughts about yourself, and if you have negative, rejecting thoughts, because of the LoA you will attract rejection and negative feedback, so she rejects you. Inversely, if she rejects you, because of the LoA that means that you must have some rejecting, negative thoughts about yourself, and that means that some part of yourself is rejecting you. She represents this part of yourself in subjective reality. So you see, there is no contradiction: it's equivalent.
That's my own, personal, very spontaneous interpretation now... don't know it exactly. but I guess what you interpret into her behaviour ("You're second-rate. You might get some of my attention, and only on my terms, but you won't get any of my feelings.") is what you actually think about yourself, in one reality and in the other.
You seem to have a lot of negative thoughts about yourself and about this situation. I would suggest that you work on this instead of obsessing about this woman and nagging about the situation.
Don't be offended please... I know what I'm talking about, because I am currently obsessing about a man and nagging about a situation too

In subjective reality, you are the part of myself doing this and that's why I found your post

In objective reality, doing this attracts other people doing the same into my life. It's the same. Get it?