Her husband repented from taking drugs then he went back to it. Does she have the right to seek annulment of the marriage?
Question

                I am married for 5 years with 2 kids. Before our marriage he was once a drug addict but he has leave his pass and turn to a new life.On our first year of marriage, he has stop working and spent all his time on religion. He is a follower of a group called Tabligh. He spent his time going for 3 days every month, 40 days every year & at he mosque most of the time.As a result,I hv to bear all the household & my children expenses. He has not given any nafkah for the past 4 years as he is not earning anything.I tolerated all this since I still love him. Unfortunately,lately he has been lying to me. He has gone back to drug and I did not even know the reason for him taking it. He was once a loving husband has turn to a wife beater.He has left me with debts and I have to sell our house in order to pay the debtors. I and my children have gone back to my mother's house.He was caught las month and will be inprison for 1 year or so. My question is, since I have suffered enough, I have decided to divorce him by taking fasakh.Am I at the right path. All I wanted is to start my life fresh with my two kids.For your info, he has beg me to wait for him and not to leave him. But I don't think I can as I do not trust him anymore.
Praise be to Allah.
    Our sister, may Allaah grant you relief from your distress, 
    make things easier for you, and guide you to that which is good. 

    One of the decrees of Allaah is that He tests His slaves in 
    this world to see if they are patient and content (with His decree). 

    “Great rewards come from great tests. When Allaah loves 
    people, He tests them, and whoever accepts that earns Allaah’s pleasure, and 
    whoever is angry with that earns Allaah's wrath.” 

    (Hadeeth narrated by al-Tirmidhi, 2396; classed as hasan by 
    al-Albaani in al-Silsilah al-Saheehah, 146). 

    So be patient and seek reward. 

    With regard to what you mention about your husband, it is 
    regrettable. He has committed three haraam actions: 

    1 – Not spending on you and your children. The husband is 
    commanded to spend on his wife and children. If he fails to do that then the 
    wife has the right to refer the matter to the court, and she may also ask 
    for divorce. 

    2 – His neglecting to look after his household and children 
    is a sin on him, even if he claims that this is for the sake of da’wah, 
    because his soul has a right over him, and his wife has a right over him, 
    and his Lord has a right over him. He must give each of them his right. The 
    Prophet  (peace and blessings of Allaah be upon him) regarded neglect of 
    those who are under one’s care as a sin, and he  (peace and blessings of 
    Allaah be upon him) said: “It is sufficient sin for a man to neglect those 
    whom he supports.” Narrated by Abu Dawood, 1692; classed as hasan by 
    al-Albaani in Saheeh Abi Dawood, 1484. 

    Raising children and looking after them and the house is a 
    trust that rests on the father’s shoulders. The Messenger of Allaah  
    (peace and blessings of Allaah be upon him) said: “Each of you is a shepherd 
    and each of you is responsible for his flock… the man is the shepherd of his 
    household and is responsible for his flock.” Narrated by al-Bukhaari, 893; 
    Muslim, 1829. 

    Please see also questions no. 
    20064 and 
    45359. 

    3 – Taking drugs is a haraam action, and indeed is a major 
    sin. It corrupts a person’s religious commitment and his worldly interests, 
    as well as damaging the body and mind, wasting money, and destroying honour. 
    It includes all kinds of evil. 

    So beware of opening the door to it and falling in its trap. 

    How many households has it destroyed, how many people has it 
    killed, how many blessings has it ruined, how much calamity has it brought 
    about! 

    When people fall into the trap of drugs, hardly any are saved 
    therefrom, except those upon whom Allaah bestows His mercy and guidance. 

    With regard to your desire for divorce, if your husband is 
    sincere in his repentance and truly regrets what he has done, and is 
    determined to reform himself, and if you still want him, then be patient and 
    seek reward for staying with him. Perhaps Allaah will reform him, especially 
    if he has asked you to stay with him and to wait for him. The fact that you 
    have children together may also make you think more carefully before you ask 
    for a divorce, because it is better for children to be raised with both 
    their father and their mother than for them to be raised by one parent 
    only. 

    If the man is sincere in his repentance and his regret (of 
    the past), then it is better for you to be patient and to wait until he 
    comes out of prison, because that is in his interests and in the interests 
    of your children, and also in your own interests. 

    But if you cannot bear to be patient and to stay without a 
    husband for this length of time (one year), or if the man is not sincere in 
    his repentance, there is no sin on you in that case if you seek a divorce, 
    and there is nothing good in your staying with him when he is persisting in 
    that sin. 

    You have to make a great deal of du’aa’ to Allaah, and seek 
    His guidance by praying istikhaarah before you take any step. For 
    information on how to pray istikhaarah, please see questions no. 
    11981 and 
    2217.  

    May Allaah set your affairs straight and guide you both to 
    the Straight Path. 

    And Allaah knows best.