Re: What does it mean when someone says...
Yes, it's a good thing. Think of a stuffy, musty house, then you open the curtains and the lovely spring sun shines in and you open the window and a lovely, bright, warm spring breeze blows in, bringing with it the smell of flowers and fresh cut lawns. It's a saying that means you're an unexpected bright spot in my life.
That's a good thing, but MAKING yourself like someone is not. I don't think that's ever a good idea and it never really works. Who and what you really are, and how you really feel, will always be there and will refuse to be denied, and will come up from the dark recesses of your subconscience you've banished it to at the most inopportune time, so you might as well deal with it.