The most important tip you have to keep in mind when you fall or liking for a girl with a boyfriend is to avoid getting attached to her.
If you’re single and just looking for a nice time, you can flirt back and encourage her. She may even have an affair with you while she clears the confusions in her head.
But if you’re looking for a serious relationship or liking, back away from her because there’s a bigger chance that you’ll get hurt. Always be on your guard and stay cautious when you’re dealing with a girl who’s already taken. And don’t fall for her unless she leaves her guy.
You need to keep in mind that many pretty girls have a wonderful way of mysteriously disappearing from your sight when their boyfriend starts giving them attention again!