Not very likely.
In an interview published in The Sunday Times in 2014, JK Rowling herself states about another relationship, the pairing of Hermione and Ron:
"I wrote the Hermione/Ron relationship as a form of wish fulfillment," she says. "That's how it was conceived, really. For reasons that have very little to do with literature and far more to do with me clinging to the plot as I first imagined it, Hermione ended up with Ron."
"I can hear the rage and fury it might cause some fans, but if I'm absolutely honest, distance has given me perspective on that. It was a choice I made for very personal reasons, not for reasons of credibility. Am I breaking people’s hearts by saying this? I hope not."
The interview is behind a login (possibly pay) wall on the site of The Sunday Times but excerpts are available in an article by Time Magazine. The quotes above are from that article, emphasis mine.
There is an excellent answer elsewhere on this site that goes into further detail about Hermione and Ron, but these quotes make it perfectly clear that JKR kept to her original plans, without yielding to possible outrage by fans.
It's unlikely that she would've yielded on other points.
Also, while it's hard to prove absence, I've never heard of such supposed outrage by Harry Potter fans over a possible rift between Ron and Harry.