IMO the O.P. is in big trouble, or heading for it!
In the Bible's O.T., in Exodus 29:7 it states quite clearly "You shall not make wrong use of the name of the Lord your God; the Lord will not leave unpunished the man who misuses His name"
also, later in Exodus 22:28 "You shall not revile God, nor curse a chief of your own people"
If you want to see and experience the Lord's kindness and unmerited favor - then take care to respect Him, and if you are a Christian, baptized and have experienced the "second birth" with the joyful realization of the Holy Spirit's presence in your life, then in Paul's epistles, it is written "Do not grieve the Holy Spirit of God, with whom you were sealed for the day of redemption"
IMO even the commonly used "OMG!"(said in full, and used as an exclamation of surprise or shock) is irreverent use of the Holy Name!
Regarding the woman who likes blaspheming - the obvious action for a Christian man, is to cut all association with the woman - and start confessing/repenting quick!
If you hope for good in your life - then realize that there can be no amity between "light" and "darkness" - "God is light, in Him there is no darkness at all". Christians are called to be bearers of that "light"!
As I type this, am reminded of words from the old "Fisherfolk" song : -
"The light of Christ has come into the world.
The light of Christ has come into the world.
All men must be born again to see the Kingdom of God.
The water and the Spirit bring new life in Christ Jesus."
The water of a believer's baptism, and the gift of the Indwelling Spirit received by faith! Because Christ is exalted and glorified at the Father's right hand - the Spirit is poured out on all flesh!. What they do with such a gift - Advocate,Counselor, Friend - is a totally different individual matter!