She married him without a guardian (wali) and now she wants to leave him, but he does not want that
Question

                My question is that, my friend did nikkah with her boyfriend for many years ago. just some friends knew about that nikkah. there parents were not invovled. Then they broke up and the boy refused to give her tallaaq/divorse. He got married and have kids now. She wants to get married but can not do that because of that nikkah. She has asked the boy many times but he has been refusing many years now, so what should she do? There is no Qazi here at our place know can declear her KHULLAH/tallaq.
Praise be to Allah.
      Firstly: 

    What appears to be the case from your question is that the 
    one you are asking about got married without the permission or knowledge of 
    her guardian. If that is the case, then the more correct scholarly view is 
    that the marriage is not valid, because the Prophet (blessings and peace of 
    Allah be upon him) said: “Any woman who gets married without the permission 
    of her guardian, her marriage is invalid, her marriage is invalid, her 
    marriage is invalid.”

    Narrated by Ahmad (24417), Abu Dawood (2083) and al-Tirmidhi 
    (1102). Classed as saheeh by al-Albaani in Saheeh al-Jaami‘, no. 
    2709 

    Some of the imams are of the view that a marriage done 
    without a guardian is valid, and they classed as da‘eef (weak) the hadeeth 
    which stipulates that there should be a guardian in order for the marriage 
    to be valid. 

    This has been discussed in the answer to questions no.
    126430 and
    7989. 

    Secondly:  

    If the partners are separated in a marriage concerning the 
    validity of which the scholars differed, it has to be done through talaaq 
    (divorce). 

    Shaykh Ibn ‘Uthaymeen (may Allah have mercy on him) said: 

    With regard to the marriage concerning which there is a 
    difference of scholarly opinion, one of two scenarios apply: 

    1.The married person thinks that 
    it is valid. If he thinks that it is valid, then the talaaq counts as such, 
    and there is no confusion concerning that. For example: a man got married to 
    a woman who breastfed from his mother three times, and he thinks that the 
    breastfeeding that makes a person a mahram is five feedings. So the marriage 
    is valid in his opinion. In this case talaaq undoubtedly counts as such.

    Similarly, if he married a woman without witnesses, and he 
    thinks that witnessing in marriage is not a condition of it being valid. In 
    this case talaaq counts as such. 

    2.The married person does not 
    think that the marriage is valid. In this case the scholars differed as to 
    whether talaaq counts as such. Some of them said that talaaq does count as 
    such in this case, and some of them said that it does not. Those who said 
    that it does not count as such said that it is because talaaq is connected 
    to the marriage contract. He does not think that the marriage is valid, so 
    he cannot issue a talaaq. This reasoning is good and there is nothing wrong 
    with it.

    Those who say that it does not count as such say that is 
    because, even though he does not think the marriage is valid, others may 
    think that it is valid. So if he leaves her without talaaq, then a man comes 
    to her who thinks that the marriage was valid, he can never marry her. So 
    talaaq is valid with regard to a marriage concerning the validity of which 
    there is a difference of opinion, even if the one who issues the talaaq does 
    not think this is valid, because if he does not divorce her by talaaq, this 
    will leave this woman in limbo. 

    If someone were to say: Why does the talaaq count as such 
    when he does not think that the marriage is valid and talaaq is connected to 
    it? We say: That is so that he will not prevent her from marrying someone 
    else, because someone who thinks that that marriage was valid may want to 
    marry her, and if this husband does not divorce her by talaaq, the other man 
    will never be able to marry her, because he thinks that she is still married 
    to him. Hence the author said: “Talaaq counts as such in the marriage 
    concerning the validity of which there is a difference of opinion.” And it 
    says in al-Rawd: “even if the one who is issuing the talaaq does not 
    think that.” 

    End quote from Sharh al-Mumti‘ by Ibn ‘Uthaymeen, 
    13/25 

    For more information please see the answer to question no.
    116575 

    Based on that, if they did the marriage contract in the 
    manner mentioned in the question and they think that it was a valid 
    marriage, then it is essential to divorce by talaaq, so that their 
    separation will be confirmed. 

    If the husband refuses to divorce his wife by talaaq or to 
    accept her khula‘, and she will be harmed by staying with him, then in this 
    case she should refer the matter to the Muslim qaadi (judge) so that he can 
    issue a divorce (talaaq) from him. If she is in a non-Muslim country, then 
    she should refer the matter to the people of knowledge in the Islamic 
    centres, because they take the place of the Muslim qaadi, and if they rule 
    that she is divorced by talaaq, then it counts as such. 

    And Allah knows best.