1. What are the scientific foundations of the vectors' system? 2. Personal issues and solutions

1. I read a lot about vector psychology and its principles, but I did not quite understand where this theory comes from, as the sources in internet are not so clear or abundant about it. It seems that the users are just accepting this system as the truth, but what is its origin? A long time ago Freud posited that a person's attitudes are related to its orifices in the body (like eyes, ears, mouth,...), but I could not grasp the scientific foundations of this system. Which experiments were performed (behavioural, cognitive, neurological,...), which population statistics was applied, how the 8 vectors' identity was determined? Briefly: What are the scientific foundations of the vectors' system and how was it experimentally tested, in order to be accepted by the psycological community? Could you help me to understand it? Maybe with some attachments of scientific articles or reliable sites?
2. Now it is a personal issue: I have been in a relationship for 5 years already. But lately, in a war context, I slowly lost connection with my boyfriend (from now on I will call him A.) both physically (we have been in different places for a long time) and emotionally (we did not spend enough time sharing our emotional state, or in general, spending enough time together). I experienced alexothymia, which lead to apathy and dissociation disorder of personality, a state that lasted for a long time, but I was not aware of it. I have been spending a lot of time with another guy, which translated in a romantic relationship lasting a few weeks. In this dissociation state, I lied to A. despite he was asking me about the situation. In the meantime I was in a state of depression that I could not carry for longer, and in this context, A. discovered about everything, in the worst way possible. He broke with me leaving a bitter letter. This was the event that slapped me on the face and finally woke me up. The dissociation disappeared almost suddenly, together with the apathy and the alexothymia, and since then I have been trying to answer myself questions related to my actions and behaviours, considering that I was not trying to break with A. but I was subconsciously searching for our lost emotional connection elsewhere. We had one conversation since then, and he considers this the break and not the crisis. I already found out about couples who overcame similar situations, so the question is whether there is the will from both sides to have a long and hard work path on our relationship, and to become the next version, improved, of our couple, which I truly think it is worthy the effort. Is it possible to build again our lost closeness and trust, considering what happened and especially considering the situation of dissociation disorder I was not aware of, at the time of the fact? Could you please substantiate with examples, advices, approaches,...