Take a step back and realize what is going on in your life. Everything you do can affect your life in either a positive or negative way. It doesn't matter about what you want to do, it matters if it is right. You need to always need to do the right thing, whether it affects you in a good or bad way.
In my life right now, I have had to decide on a lot of things. But, I have always chosen to do the right things. They didn't affect me in the most positive of ways, but I know now that they were the right decisions. Sometimes taking a step and doing the right thing may be hard, and even though it might affect you in a negative way at first, it will soon make your life very positive.