According to dictionary.com like means:
of the same form, appearance, kind, character, amount, etc.: I cannot remember a like instance.
corresponding or agreeing in general or in some noticeable respect; similar; analogous: drawing,painting, and like arts.
Dialect , likely: 'Tis like that he's gone mad.
Dialect . about: The poor chap seemed like to run away.
in like manner with; similarly to; in the manner characteristic of: He works like a beaver.
resembling (someone or something): He is just like his father. Your necklace is just like mine.
characteristic of: It would be like him to forget our appointment.
as if there is promise of; indicative of: It looks like rain.
as if someone or something gives promise of being: She looks like a good prospect for the job.
It is also the only word that I am aware of that can be considered an adjective, preposition, noun, verb, and interjection. But seriously...we use this word for A LOT OF THINGS!! Like seriously :)
How many of us know a "valley girl" or a teenager that says "like" every other word...or it is there version of the word "um". Facebook has completely taken this word and made it a phrase like "Google it" specifically go "Like It".
In addition, it is like the number one phrase at the beginning of a relationship...you don't want to say that "L" word so you end up asking...."Do you like me, like do you like me like me?" See how I was able to do that..I used it four time in one sentence.
So....from all middle and high school teachers everywhere....lets get a thesaurus and come up with a different word.