You've asked this many times and you're barking up the wrong tree. A man or woman who chooses to be with another person potentially for the long term isn't "influenced" in that way because people are not puppets. Men and women can change their minds about future potential or change their minds while in a committed relationship -no guarantees.
But a person who wasn't available to date seriously because of major life changes who was reasonably healthy and reasonably thoughtful would tell another person who obviously wanted to be with him or her "hey I really like you, I like hanging out with you - and right now with all this turmoil (fill in the blanks) it's not the best time for me to focus on you. How about I call you in a few weeks or (month) when I'm settled ... and if you're still interested and available we'll see where we are." That's rare but it happens with authenticity - why in the world would a person risk not showing up as her best self if she saw serious potential and have the other person lose interest?
And lots of things can influence level of attraction -when I was sleep deprived with a newborn I wasn't much interested in sex (nor was it allowed, doctor's orders), and there are many things that influence attraction to one's partner -mental and physical health, stress etc but I don't think any of that influences whether the person feels chemistry, a spark. It simply influences the level of attraction at a given time - someone with a gross cold might be repulsed at the thought of kissing their partner but it's not an issue of whether that person is generally attracted to their partner.
Also some people have that friendship caught on fire experience -all of a sudden one day that platonic friend - you're like -wow - I feel a spark -this is so weird! Happened to me at least once and can happen like if you work with someone for years and a situation changes -someone is single again etc you see that person differently. I don't think that applies AT ALL to your situation.