If so, you need Proverbs 5. Like, now. It's strong medicine and shock therapy. Then please go read this personal testimony to the wisdom of Proverbs 5.
Even if you're not toying with an affair, you need Proverbs 5. It's vitamins to guard against spiritual immunocompromise. You need all the defenses and offenses the Bible offers in your fight against the powers of sexual temptation.
If you think you could never toy with an affair, read this. Then humbly flip back to Proverbs 5. God opposes the proud, but gives marriage-protecting, marriage-sweetening grace to the humble.