I feel terrible and regret everyday because my girlfriend broke up with me and it was my fault.
Look it wasn’t your fault, if she broke up with you that’s on her. Give yourself some time and understand how to let these feelings go.
You should then actually think it’s because of you she broke up or because of herself, she did this.
If it’s the latter then you have to move forward and take it easy. It will take time but you will be over her.
everyone makes mistake so dont worry about it. if it was meant to be or she truly wanted you she would of messaged you or forgave you. so just keep moving and at some point you will find threw love don’t worry.