You can't make yourself shorter, but 180 cm is nothing to be self-conscious about! You're about the same height as celebrities like Liv Tyler, Minnie Driver, and Kate Middleton (all 178 cm).
Everyone's different, and some of us stop growing very early or quite late - but many sources (see below) say that girls usually stop growing around the age of 16 anyway. So you may find that you don't get any taller, while a few of your friends have late growth spurts. Even if you do continue to grow, try not to worry about it, as you're well within the range of normal human heights (the world's tallest woman was half a metre taller than you).
When you're an old women, you may get a bit shorter because your spine will compress. However, you'll probably be much more relaxed about your height by then anyway.
Sources: Adolescents in the Internet Age by Paris S. Strom and Robert D. Strom, page 428; Growth, Maturation, and Physical Activity by Robert M. Malina, Claude Bouchard, and Oded Bar-Or, page 61; Paediatric Exercise Science and Medicine by Neil Armstrong and Willem van Mechelen, page 160.
