She is in love with a married man and cannot keep away from him
Question

                She had a boyfriend, but he left her and got married. She has another boyfriend who is married and she used to tell him about her worries. She fell in love with him and cannot keep away from him. He promised her that he would divorce his wife and marry her, but his mother refuses to let him divorce his wife and marry her. Now she is going out with him.
Praise be to Allah.
      Firstly: 

    You have to repent and seek forgiveness, and regret what you 
    have done by getting in touch with men who are not your mahrams, and 
    speaking to them and going out with them. 

    You must also cut off all ties with this second man 
    immediately, with no hesitation, because the relationship between you is 
    haraam.  

    How can you accept to be the cause of his divorcing his wife? 
    If you were in her position, would you accept for your husband to divorce 
    you in order to marry another woman who has come between you to spoil your 
    lives? 

    Secondly: 

    We do not know how a wise man could agree to marry a woman 
    when he knows that she has had a haraam relationship with a man before him 
    and she has not repented from that relationship. 

    Whatever happened to chastity and protective jealousy? Does 
    he not fear that this man may come back into her life again? 

    To put it bluntly, either this woman has repented or she has 
    not. If she has repented from those relationships then there can never be 
    any contact or relationship between them except in marriage. In this case 
    there is nothing wrong with marrying her, but he should obey his mother, and 
    not divorce his first wife. 

    If she has not repented from these actions, then it is not 
    unlikely that she may form a relationship with a third man and a fourth. 

    Similarly, in your case, how can you agree to marry a man who 
    is content to form haraam relationships, speaking and meeting with women? If 
    he has repented, then there can never be any meetings between you, and if he 
    has not repented, then a man like that cannot be trusted. His aim may be 
    just to have fun with you, and even if he is sincere in wanting to marry 
    you, there is nothing that would stop him from forming haraam relationships 
    with other women. 

    Hence you have to cut off all ties without hesitating, and 
    pray for forgiveness from Allaah for wasting your life in haraam pursuits. 
    Turn to Allaah and ask Him to purify your heart and to remove all traces of 
    those haraam relationships which have corrupted your heart and mind, let 
    alone detracted from your religious commitment. 

    If you are sincere in repenting there is the hope that Allaah 
    will bless you with someone better than him, and will make it easy for you 
    to get married to a chaste and righteous man who will treat you in a decent 
    manner and help you to attain the pleasure of your Lord, and you and he will 
    form a believing family and produce good and righteous offspring. 

    Do not pay any attention to your heart and emotions, for in 
    this case emotion has overpowered reason and religious commitment, and has 
    harmed your spiritual and worldly interests. Your heart now is sick so you 
    should not let it lead you to Hell. 

    Seek the help of Allaah, for He will not let down the one who 
    seeks His help, and the one who humbles himself before his Lord will never 
    lose out. Do a lot of righteous deeds, and seek righteous, believing female 
    friends who can help you to deal with your worries and help you to obey your 
    Lord. 

    And Allaah is the Source of strength.