text: No one can steal your boyfriend unless he wants to be stolen. If he does, you are better off without him. Question: why would he be interested in your cousin? Ans. He has unmet needs. You need to have this discussion soon. Is this relationship--you and he--balanced, mutually fulfilling and exciting? If not, then, you must decide if you are willing and capable of meeting those needs. He must also determine if he's willing and capable of meeting your needs, too.\nAs for your cousin and her jealousy; just remember that envy is one of the most effective ways to self-destruct.