I will start by saying that I believe 100% that parallel worlds exist. An explanation of this shall come later.
Do You Think Parallel Worlds Exist?
Unlikely. And even if there were one, if we cannot het there there is no use. Parallel would mean like a mirror. Questions: who is the reflection and who the original?
Parallel is not like a mirror. It's not like a reflection, it's more like a slightly different version of the same thing.
How slightly is slightly then? Very relatvie meaning. I AM thinking of matter and antimatter keeping one another in balans, but that would mean that it is similar but Opposites. For the rest completely the same
Well, it would depend on the situation, but I will wait for a few more opinions before going into my explanation.
So I just wanted to say that my logic will go into Quantum Physics, so I apologize in advance if I do not explain it well.
Yeah, it makes sense when you think of it as in quantum physics. Everything that has a chance of happening, happens. Reality "branches" off each time something else can happen.

Let me know your opinion, and then I will give my own and do my best to explain the concepts and how it works.