As for manifestations that involve another person, you probably don’t want to put too much focus on that because we can’t create in another person’s reality. No matter what we do with our energy, it can’t ‘translate’ to someone else and make them do anything. Now, this isn’t to say that you can’t ever get back together with this person, as that may possibly be the best representation of the energy and feelings that you are trying to attract into your life–remember that no matter what we want, we are always after a feeling. What also happens sometimes is when we make changes in our own energy, we line up with different ‘versions’ of people, even if they have fundamentally stayed the same, and this can make it easier to get along with them,etc…
Develop a belief in what I call the “reverse paradigm shift”. In other words, go for it before you have all the answers. Those so called negative energies (known as cognitive dissonance) are actually the magical seeds of creation and unlimited possibilities. Your destiny and your abundance will always be preceded by confusion and uncertainty. Ask anyone who’s been on the journey.
When Christians talk about abundant life in Christ, they share some common beliefs and have points where their ideas diverge, as a Wikipedia article attests! But Scripture is clear that our new life is a reality. Second Corinthians 5:17 talks about this life when it says, “Therefore, if anyone is in Christ, they are a new creation. Old things have passed away and new things have come.” And Jesus calls that life "abundant" in John 10:10.
Imagine for a moment that it’s a beautiful winter morning and there’s fresh, pristine snow on the ground.  You walk up to a hill with your sled, and slide down and take your first trip down to the bottom of the hill.  This first time, your course was pretty random, right?  Then, you walk back up to the top of the hill once more and you sled down again. Okay, the odds are that you’re going to hit at least some of the grooves you created the first time that you went down.
Israel Regardie published books with the Law of Attraction theme as one of his prevailing Universal Laws. In, The Art of True Healing: A Treatise on the Mechanism of Prayer and the Operation of the Law of Attraction in Nature (1937), he taught a focused meditation technique to help the mind to learn to heal itself on a physical and spiritual level. Regardie claimed that the Law of Attraction was a valid method for attracting good physical health and for improvement in any aspect of one's life.[63]
I understand your scepticism about the LOA as I am someone who is open minded about it. However, I kind of lost confidence in your arguments when you started to present basic premises about the LOA incorrectly. For example, the primary focus of the law of attraction is not about material wealth. It is about self development, self love and the journey to self completeness within the context of mindfulness and positive thinking. This is a premise that is widely used within peer researched clinical therapies as well as many religions. Proponents of the law of attraction do not campaign for everyone to achieve selfish material gain and wealth. I have not heard or read anyone, no matter what level in their LOA journey that they are at. Their point is about the power of a positive mindset, a principle I am very much a supporter of and as I said, this is not unique to the LOA.
"One can work toward manifesting positive outcomes; however, there are always these statements: 'I want this but not that. I want this and that, and I want this, but if I cannot have this, I will settle for this.' These types of thoughts bring forth convoluted requests and results. Using the modifiers 'not, but, and, as well as, either/or' muck things up. The energies that guide us and assist us take the request that was uttered or written and manifest things literally (including those words). It just happens that way. I tell people to only state or write down what they want and to leave out the things they do not want. The use of modifiers often provides mixed results, which may not be what someone wants," Rappaport claims.
Rhonda Byrne published in 2006 the film The Secret wherein she emphasized thinking about what each person wants to obtain, but also to infuse the thought with the maximum possible amount of emotion. She claims the combination of thought and feeling is what attracts the desire.[27] The Secret says your subconscious mind can control everything that happens around you, including both positive experiences, like having someone call you from miles away, and negative experiences, like death. The Byrne underlines the power of the subconscious mind by asking the reader to take full control of these thoughts, in order to achieve things in life, with the mind, as much as with action. Another similar book is James Redfield's The Celestine Prophecy, which says reality can be manifested by man.[28] Man and the universe have a force of attraction between them similar to a magnetic attraction. The Power of Your Subconscious Mind by Joseph Murphy, says readers can achieve seemingly impossible goals by learning how to bring the mind itself under control. The Power by Rhonda Byrne, The Alchemist by Paulo Coelho, and The Power of Now by Eckhart Tolle are similar. While personal testimonies claim the secret and the law to have worked for them, a number of skeptics have criticized Rhonda Byrne's film and book. One New York Times book review calls the secret pseudoscience and an "illusion of knowledge".[29]
Ten years later, they revisited the same Harvard MBA students to assess their results. The 13% of the class that had set goals but didn’t have them in writing were earning, on average, twice as much as the 84% of the class that had set no goals at all. However, it was the 3% of the class that had both set written goals in writing and had a plan for their attainment that astonished the researchers.