What should you do if you've just split with your long-term boyfriend and you want him back but he tells you he needs space but doesn't know if he wants you back or not?

At least he's honest and you can be thankful for that. I don't know if you split with him, he split with you, or you both agreed on the split-up. Unfortunately, you'll have to take him at his word. I'd move on, start dating again and if you are both meant to be together then you will be. I know we all make mistakes and sometimes the lessons are hard to learn, but the point is, we hopefully learn from them. If someone you love hurts you often enough then there is a point you fight back with survival instincts and you will move on and NEVER look back. Sometimes there are no 2nd chances. Marcy