Various masaail of Nikaah

Q: I hope you can help with this question. I am a revert Muslim, I was previously married. When I was a Christian even back then my marriage with my Christian husband is in trouble, we have a very rocky marriage. When I accepted Islam, I tried to talk to him about Islam. At first he seemed to be ok with my new religion but as the years go by he demonstrated so much hate with my religion, he does not want me to practice my religious rites and beliefs and demanded me to return back to Christianity to which I object. I ask him for a separation since then which he accepts but lately when I contacted him for my wish to have an annulment. He suddenly objected to it. I wanted to marry a very good Muslim man who proposed to me because I see this man to be lawful and obedient to Islamic law. My question is am I allowed to marry this Muslim man according to Sharia law? I have read so many articles regarding this. I am confused. My Ex-husband is preventing me to practise Islam and even called my religion as devil. I don't want to be with him anymore because of this issue and many more. What is the Sharia ruling on this? I hope you can guide me.

Q: What are the responsibility (HAQ) of husband over wife?

Q: Is there any special virtue recorded in the Hadith regarding attending a nikaah?

Q: Can one consider it as a great blessings of Allah Ta'ala if he gets a chance to conduct his nikaah in Masjidul Haraam?

Q: Is is true that people say if someone gets married, the woman brings rizq and barakah in his life.

Q: A girl is engaged to a guy, her nikaah will be after few months. The guy's sister is close friend of the girl. So is there anything wrong if the girl asks her friend who is the guy's sister to convey him some deeni demands that she has from her future husband? (like the girl wants her husband to get involved in work of tableegh and wear Islamic dresses and few other demands). Similarly, is there anything wrong if she put forth these demands to her future husband via his sister?

Q: A girl is engaged and she chats with her sister in-law via whatsapp. Is it allowed for the girl's fiance to see the chat if the girl has messaged something related to her fiance? Like the girl has a few Deeni demands from her future husband so she messages the demands to her sister in-law. So can the fiance read the messages directly from his sister's phone?

Q: A girl is engaged and her nikah will be after few months. Her mother in-law telephones her and asks her khair khabar once in a while she also telephones her. Is there anything wrong in telephoning one's in-laws before nikaah? Please note that she doesn't speak with father in-law or her fiance as they are not halaal for her yet. She just speaks with her mother in-law and sister in-law.

Q: Is there any limit in loving one's husband? Me and my husband are trying our best to abide by the rules of Shar'iah, we remind each other about ahkaamat of Allah taala. So alhmdulillah our relationship is filled with love. So we want to express our love for each other. So can I say to my husband I love you more than anything / you are my everything/ you are my world/my heart is perfect because you are inside /my day and night is filled with your thoughts and so on? Will it be like I am telling I love him more than Allah and his messenger? But in my heart it is not like that, even though I love my husband intensely, Alhmdulillah I love Allah and his Rasul (Sallallahu Alayhi Wasallam) and I don't agree with anyone where ahkamat of shariah will be broken if I do so, be it my beloved husband.

Q: Please inform me the law in the hanafi mazhab if news regarding the demise of one's husband was received and after iddah, the widow got married to another man but after some years the first husband comes back. Which nikaah will be valid? With the first husband or the second husband? The woman has one child from the first husband and two children from the second husband?