Got it. So after five months of dating you, he went back to his ex and you’re hurt and perplexed. Here’s the thing…. someone can treat you nicely and get along with you beautifully — and not feel you’re compatible. It’s a lot harder to understand these break ups where there’s no high drama or fighting to punctuate a break up. Not everyone is going to feel that you’re compatible — and same goes the other way around. You’ll date really nice guys who will be surprised when you feel that they’re not the one in spite of having gotten along so well. The good news is that you only invested five months. And if you follow my suggested dating time line (use the first three months to decide if you want to continue dating and the second three months to decide if you want to be monogamous), you’re right on track for not having wasted time, and for really getting to know him (and vice versa).
You didn’t do anything wrong. And neither did he. He’s just not done with his ex. Don’t be too hard on yourself or him — but do move on and look for someone who’s clearly ready for the next step, with you. 😉