Just so we're clear, arranged marriage has no correlation with Hinduism. Hinduism does not prescribe a method of courtship. Those were developed by generations of people, in reaction to their social and economic conditions.
The Hindu mythology doesn't strongly portray arranged marriage system, either. It depicted some of the wealthier sections of society to use the Swayamvara system, where the maiden has the freedom to choose her husband from a set of eligible bachelors. In most depictions of common sections of society, consent courtship ("love marriage") was depicted.
Arranged marriage, among other things like restrictive/regressive clothing/lifestyles for women, crept in as a possible reaction to invasions of foreign dominant societies, to protect native bloodlines, and so on. It stayed on as a dogma, eventually becoming a means for families to keep their children from marrying outside their unit of identity.
Now that after 900-odd years, Hindus are part of a free society, the increase in number of consentual courtship (love marriages) shouldn't be viewed as "westernization" or even libertarian. It's just...normal.