I want to put brick on an existing wall in my living room. Is it safe to do so? Will the structure be strong enough, or is there a material that can be mistaken for the real thing and is mor emanageable and less espensive?

I'd advise against real brick because it is heavy and you will require extra structural support. There are all kinds of substitutions. Check your local building supply stores for a thin, ornamental, lightweight brick that looks as if the face of the brick has been shaved off. I've seen this used quite convincingly in an archway around a countertop stove. You could also use 'brick' wallboard panels, wallpaper, or even stencil a brick design.