That's not a fundamental force and the insinuation made me dislike the otherwise nice movie, Interstellar.
Alternatively, Love is the Fifth Element, according to Bruce Willis.
I thought love was the seventh wave, according to Sting.
And Captain Planet
That’s a load of Boron.
Close - how about compassion?
That's not a force. It's a multiple of the distance.
Which is why absence makes the heart grow fonder.
Arguably love is a attractive force, but if it scales with distance than we could potentially counter cosmic expansion by separating couples and sending them in rockets flying in opposed directions
I don't think this will work if either member travels with someone else who is not the other part of their couple. The default for as long as I can remember is pretty simple, if you can't be with the one you love, love the one you're with. Therefore, love's attractive force would fluctuate too much to ever counter anything cosmically.