Though correct me if im wrong on that, id rather know now than find out later on that there ends up being a permanent seperate relationship thing, or like one of the the girls in the group sleeping with a guy that isnt pete.
Should I first read the symbiote spiderman story that is already complete or the one that is being rewritten? Is it a total change in the story or is it just a rewrite, it appeals to me a lot but I ask just in case
That is a hard choice. The plot is exactly the same with tweaks here and there. Some character motivations change but really, I'd say 75-85% of the story is the same. It's better edited, some things that didn't work were cut, things are better explained and it isn't as rushed. Some arcs are new, One is longer, and Arc Five of the original is now Five and Six, so
You won't lose anything by reading it, but really, it's entirely up to you.