I don't quite understand what you mean by that. Love is an emotion, it is not really 'programmed'; evolution and genetics make trends and tendencies rather than specific programming. You cannot program a person but with time you can change a family line to have specific behaviours and quirks, though that is generally frowned upon as being morally grey/wrong and infringing on human rights of freedom and self-determination.
As for romantic love/loves the answer is nil, null, zilch, zero, not a jot, bugger all, nada, nothing, so-far-not-appearing-in-this-lifetime, nawt, nought, nope, no, not; take your pick!
Why is there never enough time in the day for the good stuff?