Firstly, you need to acknowledge that your behavior since the split was unacceptable and emotionally unhealthy. Catfishing your ex will only serve to destroy any element of trust that existed between you.
Nonetheless, your ex appears to be sending mixed messages. On the one hand, he says he wants nothing to do with you, yet on the other, he says he wants to stay friends by text. He can't have it all ways.
You need time to heal and take stock of the situation. If your ex contacts you again, let him know that you want some space. Then follow the no contact rule for 30 days. Remember that this is about making yourself emotionally stronger, as well as not contacting your ex. Hopefully, this will help you to begin thinking in a more rational manner.