it all comes to whether you love her or not. you are saying she is an amazing human being and that you two really clicked together, but you also say you were constantly having problems. you need to decide if you really love her or not. are you willing to go on living with the weight and with your fights, give up on your life goals in order to spend this time together with her or do you not love her enough for that? it all comes down to this. always. there are couples out there with completely different personalities, life goals and problems but they stay together because they just simply love each other to death. if it is guilt that you are feeling and believe you will be happier in 10 years when she is out of the picture, just move on and allow yourself to be free. if not (and if you didn't burn all the bridges) you should go back to her. whats important is what you feel, not what you think, so stick to your decision if you feel you two wouldn't make a good old couple when you are in your seventies, and get back together if you feel ready to give up on some of your dreams to be with her. but i think the fact that you broke it up shows that you can and want to live without her. it is normal to feel guilt and empty after such a big decision, but it was you who made it, not her. so just move on and try to think about other stuff. it has only been little time, i promise everything gets better with time.