Not "throwing it in your face," just pointing out that science doesn't have all the answers, and never will. That doesn't detract from it's considerable abilities and overwhelming contributions to mankind though.From the moment I wrote that, I knew someone was going to throw this one in my face. Good thing we've long been able to observe the biochemical processes that are involved so, well, you're wrong. Love is very observable.
As for love being observable...no, not in any scientific way it's not. Love cannot be scientifically proven, esp as it's hardly as simple as "a biochemical process." But you're free to *believe* that if you wish.