I tried to estimate the likelihood two 'random' people match in chemistry and 'infatuability'.
That assumes that people fall in love based on their intrinsic attributes. I believe that it has much more to do with how they interact with each other.
Sure. Absolutely.
The idea was not to estimate the posterior probability of falling in love.
The idea was the prior probabilities I do not have (much) control over.
Checking for a match in chemistry is relatively easy. There even used to be social protocols to that end (involving e.g. handkerchiefs). Nowadays I goes the simplest approach would be to go out jogging together.
Checking for a match in infatuation also seems to be doable. Infatuated people can be spotted easily and I think I can notice early when I am falling. Maybe even speed up that.
Note I know...
This is the earlier promised post about Dealing with a Major Personal Crisis. Please continue reading there but comment here.
The reasons for posting it this way are explained at the end of the link. I hope this approach does what I want it to.