Yeah. That's a sad truth. Once someone like you has been fooled into flatearth it is, based on my experience so far, impossible to convince them of the truth.
I'll try to anyway.

Did you even once take a look at what you are believing and how much it conflicts with the real world?

Give a good answer to all of the following conflicts, and I you might even convince me:

How can it be on a flat disk that there are time zones AND that the sun sets below the horizon?
How can it be that the sun tends to set and rise in the south(if you are living on the northern hemisphere) and not in the north as your model proposes?
And then there is also this collection of arguments(made by @daznez):