Hello Friend, Good that you are seeking a help here. It's quite common to have such feelings when you are getting into another relationship after a failure. It's all your mind set. If you are fully convinced about your decision was right about the breakup and no guilty feelings, then you are absolutely ready to look for another relationship.
You may take some counselling support to learn few mental behavioral changes and excersise to overcome from such emotional impression.
Next Steps
Feel free to reach out to me online through Practo app for further evaluation and recommendation.