When a romantic relationship grows hum-drum, sometimes a new man catches a woman's eye. "If you're a female, like most other females, prior to cheating on your partner you always proclaimed yourself to be 'not the type' who would ever cheat," writes Michelle Langley, author of "Women's Infidelity." Langley explains that most women who cheat are shocked and appalled by their behavior but can't stop cheating either. The key to prevent cheating in the first place is to nip your newly discovered romantic feelings in the bud.Step 1Keep your distance from the new man. Don't call or text him or hang out with him. If you communicate with him on a social networking site, block him or remove him from your list of friends. If you spend time with him on a regular basis, let him know you're not avoiding him because you don't like him, but that you want to preserve your relationship with your current boyfriend.Step 2Frequent places where you won't run into him. If you know he likes to go to a certain bar, restaurant, gym or park, make it a point not to go there. Also avoid going to places where you might run into his friends, family members or coworkers.Step 3Occupy your mind with other things. Don't spend time thinking about the new man or fantasizing about him. When you do think about him, pick up a book or magazine, watch television or phone your boyfriend. Toss out any reminders of the new man, including photos, letters and emails.Step 4Participate in distracting activities. Go to the movies, invite friends out for dinner or exercise. Start a new hobby or enroll in a class. Keep yourself as busy as possible to avoid thinking about the new person.Step 5Reignite the passion in your current relationship. Make regular date nights, invite your boyfriend over for romantic dinners or take quiet strolls on the beach. Take a weekend getaway with him or plan a longer vacation so you can get to know each other intimately all over again. Make sex a priority, says relationship expert Phil McGraw. "Give yourself permission to get what you want," McGraw advises. "Claim your right and give a voice to your needs. Being sexually satisfied and feeling wanted by your partner is a legitimate and healthy part of a relationship."Step 6List the reasons you want to stay with your boyfriend. Don't just jot down superficial qualities such as "He's handsome" or "He's good in bed." Consider his deeper qualities. Perhaps your boyfriend makes you laugh, supports you emotionally, listens to you intently and loves you unconditionally. Also list how you would feel if he cheated on you or left you. List why he's important to you and why he is unlike anyone else.