Doubts and insecurities form the past can hold you back from the most wonderful relationship. It's so easy to walk away when things don't work out exactly as you planned. Before you do this, take some time for reflection. Think about what it is that's causing you doubts. Work on these issues. Together if you can, but if not build on your own strengths, but work on the relationship before you walk away for good. The best relationships have strong foundations. They take work and commitment.