Umm Yea! I used to be terrified of this as well! First of all don't compare your journey to anyone else ever! How you feel is specific to your manifestation and your manifestation alone. Also, people can be sure they have their desire and that is absolutely okay but if they haven't manifested it within a year there is definitely some resistance and they need to detach. Sometimes people just imagine manifesting their goal of their love and the relationship is a really big deal and therefore it is a big manifestation. However, if we just let it go and leave it up to the Universe, there is no reason your manifestation cannot be delivered with Diving Timing. 

It honestly differs with people. Some people like a friend I have can detach so easily, her favourite words are "**** it, I'm not losing sleep over this" and anything she desires pops into her reality. Others feel as if they have their goal but are so set on having it manifest in a specific way it creates resistance. I asked my friend how she's able to get anything she wants with no resistance and her words were "I know I won't die without it".  

I see all the people here talking about what is. They all try to attract their ex back what in and of itself can't work, because the term "attracting an ex back" is focusing on the current reality. I see many people talking about staying positive, but having no clue how to apply LoA. So, I wouldn't worry about what the others are doing.

Does anyone ever tell the person who they are visualizing what they visualize?

No.

A guy once told me that he was trying to summon me into his life. At first, I was flattered. Then,  I didn't like his public displays. He would post his visuals online.  I was annoyed.