They're not really the right kind of lines for Botox. It works best for the 11s, above your nose. I did it when I was 33 on a whim, carried on sporadically for a couple of years, and stopped when I got pregnant. Now I am in my 40s and wouldn't dream of getting it again.
Whenever a make-up artist does my face (they are usually about 18) they always seem to comment on how expressive my face is. i.e. wrinkled, I felt to begin with. Now I have a slightly different point of view. People of our age thought that women got older by getting wrinkly. Young people think that people get older by losing function in their face. It's a bit like being thin or tanned: unfashionable in early 19c England when it was easy to be consumptive or underfed and work outdoors. Fashionable in the 20s, when people didn't work outdoors as much and there was tinned food, cheap calories etc.
So, as I see it, the more people get Botox, the more obviously ageing and aged a Botoxed face is. Did you read the Caitlin Moran piece in the Times last week? I enjoyed her self-recantation and thought it was funny. But in the photo she didn't look like someone with subtle magical line-blurring Botox. She looked like a middle-aged neurotic woman with the tell-tale panel of shiny flat skin in the centre of her face. And that's in a photo. People with Botox look much more conspicuous in real life because their faces fail to respond to normal cues.
So, no. Do not get it. It will make you look like a neurotic middle-aged woman. Young women have mobile faces. You are young, leave alone! Or try once, save the photos, and look back in a few years. I looked older than I do now and I have pretty dry sun-damaged skin when I was 33 and Botoxed. Either way, it won't make much difference now, but in ten years I strongly suggest you don't get it!