It is old fashioned? I remember hearing it frequently in NZ back in the 1980's. Depending on context "love" can be used sarcastically.
Fwiw, I think Beagle makes a good point. There are posters who provide good insights, even though they may have some opinions which do not necessarily concur with my own.
Magda Szubanski using "love" in a skit on Fast Forward. - about 2.06m in...
https://www.youtube.com/watch?v=5-9BXQf95uY