Kes established in Season Two's Elogium that she wasn't even 2 years old yet. If her biological age then was about 20-25 human years, that could put the Ocampan year at over a human decade. I would say about 1.5 years = 20 human years, in which case, 1 Ocampan year = 13.33 years for a human.
Figuring 1 year old in the DQ, 1.5 y.o. meeting Neelix (about 20 y.o. for a human) - and about that age in Season 1 Episode 1.
OK, then by Season 3's Warlord (about halfway through that season), she would be roughly
1.5 + 2.5 seasons = 4 y.o.
4 x 13.33 = 53.32 years old!
Hm, aging well!
And saying that a year is like 13.33 years to an Ocampan, their relationship lasted for the equivalent of 2.5 seasons, or
33 Ocampan years. And I'm not even counting that time between episodes is months, not weeks. Nor even the months they dated prior to her kidnapping by the Kazon! Which pushes their relationship closer to the 40 year mark!
So Neelix & Kes were an item for (only) about 40 of her years.
And here we sit wondering whether they will last.
Which is kind of weird when you think about it, consdering the Ocampan Elogium occured when they were between 4 and 5. For a human that would put it at 53-66 years old. Old enough to take responsibilty for your choice of mate. But then, so is a 1 year old Ocampan, as not a single Delta Quadrant individual ever batted an eye at her claim of being in a relationship as a consenting adult.
Disagree if you like - and go out and tell a person in their 20's whom they may or may not date. Good luck with that!
Neelix saved her life. He didn't make her leave university to be a barefoot frontier wife. They both knew what they were getting into. And here we sit, questioning whether their 40 year
marriage is an adolescent crush.
With Kes, a 1 month dalliance with a dashing pilot would be a year-long devastating affair in her relationship with Neelix. So yeah, high stakes, those little innocent jaunts on the holodeck with a guy with the hots for her.
And finally I will just ask, how would Kes feel about Neelix spending that time doing the same thing with say, a cute whisker-tugging fruit-girl who decided to stay aboard ship while Kes was still around? Think she would so calmly brush it off as innocent while carrying Neelix's child?
Nope. She wouldn't confront him about it either. Kes would just go ringing Tom's doorbell and then not explain why she was no longer talking to Neelix. You know, all calm and collected-like. But indulging her actual desire while suffering the very same betrayal she dismissed out of hand in Neelix.