The answer is you alone can't do anything without the help and approval of your partners, or the other shareholders, unless your articles of association provided for a possible sell off or buy out policy when you and they got together to form the current business. You say you started it, so that may imply that you are the creative genius behind the company and the others provided the finance to help get you going. If that is the case they probably won't want to buy you out and loose your valuable input at this stage. If however you share the skills equally between you then they may be happy to buy you out. Either way you need to talk to them, and set some targets for the short medium and long terms. You seem to have got off to a great start. Your turnover and growth are fantastic at this stage of the business. Most small businesses do not make a profit at all in the first 12 to 18 months. With your growth rate your turnover will double in less than 8 months to $30K/month, and if your profitability remains on track you should then be making over $130K/yr.
That should keep you motivated and interested for some time, and will make other companies sit up and take notice of your business. This in turn may lead to takeover bids etc. But as I said at the top, you need your partners to go along with your plans, so talk to them!