Silly? Well ...... put it this way, they seem to have [a lot] more money than sense!
Madly in love? I doubt it;... realistically, how can someone claim to "love" another person
if he/she hasn't met the "object of his/her affections"? Infatuated, perhaps ... but not "in love".
Infatuation - bordering on obsessiveness - can cause people to act in a, often irrational, manner ... like becoming unwittingly hooked on dating sites.