It is good to make your man feel jealous at sometimes. However, if you constantly make him feel that way, he is going to get tired of it. This actually creates uncertainty about the relationship. Flirting with other men will only humiliate him. If you have to make him jealous, do it once in a while. One reason why women want to make men feel jealous is because of her own insecurities. Those consistent attempts to make him feel jealous could have led to your break up.