"I stayed by her side forever" doesn't make sense thoughbeit, you can't talk about the forever in the past tense
it should be something like
"I'll always stay by her side forever"
"I decided to stay by her side forever"
"I stayed by her side, and I'll continue to stay by her side forever"
talking out of my ass albeitever, it definitely doesn't make sense in spanish but since english is fundamentally broken maybe you can break common sense rules or something idc
