Break ups can be hard, it can hurt. You shouldn’t be afraid to rock the boat if someone falls out (be it someone close or not) they were not suitable for you boat to begin with.
As
>>2 said you can learn from your break up, you can make sure you don’t make the same mistakes, fall for the same mistakes and ultimately form better relationships In the future.
Not every relationship is meant to be, sometimes people are not made for each other. Don’t blame yourself, your not to blame, Neither is your ex. There’s plenty of people out there, you will find a person better suited for your boat.