Loli and Self Sketches

And here is what I did in math class today
And then I doodles my portrait in the car, using the mirror, which explains why it's skewed to one side

Incidentally, I'm in despair because of a moral dilemma:
My best friend is a really good artist.
At one point, she wanted to get a deviantart account, but then she decided not to for whatever reasons. While I was talking to her, she expressed her dislike for people who spam the internet with bad art, i.e. on Deviantart. So I didn't tell her I got an account, because technically I'm one of those people .

But sooner or later, it might come up that I do have an account. So I don't know if I should just tell her now, or wait and hope it all blows over and she never finds out. I love my best friend to pieces, and I really don't want to upset her, but either way, I'm getting on her nerves; either I keep it from her, or I tell her that I've been keeping it from her. Help?