Dangers of mixing with male cousins and relatives
Question

                A Muslim girl who was born and lived in America, goes back to her homeland once or twice a year with her family. She has a male cousin (son of paternal uncle) in her homeland who, whenever he is alone with her, touches her, kisses her, enters her room and locks the door, etc, but he has not committed zina with her, praise be to Allaah. She does not like what he is doing and she feels upset and regrets what is happening. She wants to know what she should do because she is going to travel there soon.
Praise be to Allah.Undoubtedly what your cousin is doing to you 
    is clearly haraam and a great evil, because that is only permissible with a wife with whom Allaah has permitted intimacy. 
What you must do is to denounce that and 
    refuse, and do not be a partner in the sin. A man usually cannot do that except with the consent of the woman. 
You should note that a male cousin is a 
    stranger to you, like any other non-mahram. It is not permissible for him to be alone with you or for you to uncover any part of your body in 
    front of him. He is enjoined to lower his gaze and refrain from looking at you, and you are enjoined to do likewise. 
A person who transgresses the sacred limits 
    set by Allaah must be rebuked and spoken to harshly, and you should threaten to tell your family and his. 
If he tries to grab hold of you, you must 
    push him back and run away from him. 
Beware of taking the matter lightly or being 
    soft in the way in which you deal with him, for the Shaytaan may make this sin attractive to you and you may agree to it, in which case you would 
    become subject to the wrath and punishment of Allaah.  
Unfortunately many people are careless about 
    protecting their daughters and sons, and they make it too easy for them to fall into this kind of sin, especially with regard to cousins, because 
    they are ignorant of the obligation to be covered in front of them, or because their faith and protective jealousy is weak. Allaah is the One 
    Whose help we seek. 
You have to repent to Allaah from this haraam 
    action; simply regretting it is not enough. Rather you must repent sincerely from committing sin and resolve not to go back to it. 
You must also avoid the reasons that may lead 
    you to commit this haraam action, such as being alone with your cousin, shaking hands with him, meeting him and talking to him. You must avoid him 
    completely, so as to ward off evil and prevent immorality, and close the door to fitnah and sin. 
Allaah forgives those who repent, give up 
    their sin and turn to Him. 
And Allaah knows best.