Am I obligated to stay with a porn-addicted spouse?

This depends on a whole host of issues, so you’ll want to see a pastor for more specific advice. If you aren’t married, then no. You don’t HAVE to stay in that relationship. If you are married, then maybe. Did they cross the “flesh line” and physically cheat? Are they battling this sin with repentance and the gospel? Are they sorry for the sin and trying to love you – or have you been deserted by them, immersed in marriage-wrecking porn? There are too many variables to answer such a vital question simply. Once again, please see your pastor to help you through this painful time.