Somebody

"I pray God send co-laborers into the life of every believer that is seeking the face of God and longing to be used for His purposes and glory. 

Let NO hinderance come from wrong alignments and ungodly or unfruitful relationships. "

once said :-).

God doesn't want you to stay in relationships that don't serve his glory.

It's perfectly acceptable, and I would argue, he would prefer that you walk away.

2 Corinthians 6:14

Do not be yoked together with unbelievers.
For what do righteousness and wickedness have in common?
Or what fellowship can light have with darkness?