Let’s look at one thing at a time:
If your relationship relies on "obey him at all costs" and "being submissive to my partner", then it sounds to me more like slavery than love.
I am not sure why this has anything to do with religion or the Bible being true or not, unless your "him" and "partner" here is referring God.
If you "have reason to be suspicious" about him doing drugs, then you have to find out the truth now than later. You can get drug test kit in many store, so you can be sure.
May God and Angels guide you.