Jealousy is healthy, but too much jealousy with no sense at all can destroy a relationship. As a man, it’s totally normal to look an attractive woman but that doesn’t mean you need to be suspicious. If you started to get jealous, then it show’s that you are being insecure. You will know if your man is cheating on you when he started to act strangely and will never talk to a woman in front of you. You need to believe in yourself and also believe in your partner, it’s not a good thing if you are in a relationship with lack of trust, doubts and pure jealousy alone.