How do you begin again?

Is it possible to start again after dedicating 10 years to what ended as a failed relationship? All the unanswered questions, will they ever be resolved, answered, or are they destined to haunt until you can no longer remember? Because I fear I will never forget, so now I am faced with the struggle to find a way to move past this, with the knowledge that is may remain illusive. Am I / was I at fault? Did I not do enough to keep him interested? Did I deserve to be treated the way he treated me? Did I make the right decision not to go back? Am I strong enough to survive this and become a better person? Will I ever truly be able to find happiness? Is there someone out there for me? Do I need someone? Who wants to be with someone that has to children already? Who would want me, a single mum, studying full time, no money, who lives at home with her parents because her ex, the father of her children, would not move out of the family home. All these and many more continuously flow through my mind, they can not be squashed, and always, always creep into the back of my subconscious, making me second guess myself. Doubt myself. Even four months later I'm still struggling, but I recognize and accept my emotional state, feel what I have to feel and move forward. Some days are easier than others, some days I feel as though I'm moving backwards, others that I am making leaps and bounds in a positive direction. I look forward to the day when I have balance, courage and happiness. One day.