People walk around today calling everyone their best friend. The term doesn't have any real meaning anymore. Mere acquaintances are lavished with hugs and kisses upon a second or at most third meeting, birthday cards get passed around offices so everybody can scribble a snippet of sentimentality for a colleague they barely met, and everyone just loves everyone. People leaving teams are lathered with such lavish praises that true efforts are lost. As a result when you tell somebody you love them today, it isn't much heard. The sincerity of those few true wishes gets lost in the cacophony of meaningless mechanical blurting of praises and appreciation. So next time someone says a "Thank You" or a "Love you" or anything that has any semblance of praise or appreciation or even love, know that a critic is your best friend not these sycophants.
PS: For all those people who love to hear good things about themselves. Know that it is your low self esteem that drives you to want such superficial and meaningless appreciation.