>>118679415She was originally created to be a dyke with MJ, the relationship was being developed at a natural pace, then some years in Bendis got a hold of her for a couple of issues for a crossover and in classic Bendis fashion decided to do as much as irreversible damage as humanly possible in the short amount of time he had, so he rammed in a completely forced and unnatural relationship with Miles in the first few issues after their meeting, which they decided on out of obligation after being told it would bring a perfect utopian future to the universe.
The story went nowhere, did nothing interesting, had no consequences, growth, or development, was immediately undone, forgotten, never mentioned again, and was acknowledged by Gwen as awkward and forced in-story. Both of them had different romantic interests before and since and never interacted again, but Sony curiously decided that out of 5 years worth of Gwen stories and 10 years worth of Miles stories, these couple of issues by a writer who is now at DC is what deserves adapting into two animated movies worth ~$200M.