We not be certain of anything according to that model ? The first girl I fell in love with ... I didn't have a book telling me anything about her. I didn't base it off the accounts of others. I fell in love with her, on our own. I didn't need to verify her name first. Her name was largely irrelevant to me, although I liked it. There were things about her I liked, things I didn't like ... but I fell in love nonetheless. There were many things I am essentially certain of (barring solipsism) that we experienced together, yada yada. What we felt for each other, etc ... certain ? Essentially unfalsifiable. Our actions and choices ? I'm fairly certain we existed in reality and the events happened, even if I may not remember every detail of every moment. Regardless of what others thought of her, my personal experience with her stood on it's own, I drew my own conclusions, etc.
If a being showed up and claimed to be Yahweh, or anyone name for that matter, one could draw their own conclusions based on personal experience with that being as well.
Concerning your last statement ... would you like to share some examples of your methods and what you've discovered using them which lead you to conclude what you've concluded concerning Yahweh as well as what you've concluded concerning yourself ?
Hmm, I'm not questioning if you love, or not, but that if the object of your love is Yahweh, or not. We can love for any number of reasons and this in no way substantiates the object of our love, or its nobility. For instance many people fall in love with evil people. We can create our own Yahweh, one of our choosing, and love Him, of course; which is what many people do because they don't love the Biblical Yahweh, at all.
I'll give you my methodology for discerning accurate representations of Yahweh. I've formed a relationship with Yahweh over many years of searching for who He is, His characteristics, and what he wants from me. Prayfully I ask/seek in all situations in my life ( pray always ) and day by day he guides me into good and correct thinking, in all life matters I ask. He also pursuades me in areas I don't seek him on ( I often don't know what is best for me and therefor don't ask ) and in areas where I think I'm acting correctly, but aren't. Interestingly this model fits precisely with the Biblical model and intuitivley fits with the model of a good Father teaching a child.
Now inside this method of teaching, Yahweh gives extra help, according to the humility and need of the child ( and also according to the ability of the child ), in the form of spirit gifts. I have some spirit gifts which are helpful in communicating my needs and discerning situations.
I'm not going to give you exact descriptions of events in this matter, for several reasons.
ETA. Oh dear I omitted something very important that may not be readily understood. The Spirit of Jesus enters the Christian, once Born Again, and this creates an inevitable change into His likeness, over time, if we endure to the end. ( I'm actually a PoS person )