Interpretation of God's view on Separation and Divorce

God is against separation and divorce once the union is establish. But with the increased adultery and fornication today, increased in STD's, should a christian stick with a man or woman living such life and exposing him/herself to danger of being infected?

If the wife/husband tells the wife/husband that he/she is done with the union and move out and start a new life, will the sister/brother risk staying unmarried especially if they are still young and fall to the trap of committing adultery?

From every angle, God does not delight in separation and divorce neither do He delight in adulterous life, with the temptation here and there and human nature for how long will the sister/brother remain unmarried? What do we follow, denominational interpretation or Bible opinion. Which one is correct, divorce in event of adultery and no matter the problem even in the event of adultery, you should not divorce. I will appreciate your opinion.