Desirai, you will find, as you go through life, that a person who breaks off a relationship will always rationalize that it is the other person's fault. People will very rarely take responsibility for their own choices or actions.
If he thinks it can't be his own fault, then it has to be your fault, and your chickens are just an easy excuse and a rationalization. The truth is that he wants to gather as many women as he can, and he had another opportunity and he took it. That happens to be a guy thing and it very common with younger guys. Immature men tend measure their own value by how large a "herd" they can amass.
Even though you are the one who was left, it really has nothing to do with you. I suggest that you consider yourself out easily since he broke it off instead of trying to string you along while collecting the next girl, too, so he can have more than one at a time. That, unfortunately, can also be a guy thing.
On the placing blame game, you will soon find out that anyone (male or female) who wants out of a relationship will often start a lot of fights. Then they can leave because the other person is "so unreasonable and hard to get along with"
If that is your own photo, then you are a darling with a sweet face. When you smile, you must look very warm and caring. That's valuable. Hold yourself in high esteem and hold out for a guy who actually deserves you. Don't ever settle for a cad because you think that is the best you can do. Because there are decent men out there who treasure their mates.
Good luck to you.