If HE wants advice on how to terminate his current relationship, HE needs to seek it, HE needs to initiate it, and HE needs to make that happen.
You initiating that, whether he asked you to do so or not, ESPECIALLY with the information you're saying he has provided to you regarding filing while living together (completely untrue and a line of B.S. he's feeding you), is why people have responded the way they have.
The respondents here have not been insensitive to you, but given you very sound advice to keep YOU from getting hurt...