Girl not accepting the nikaah

Q: A friend of mine was forcibly married to her cousin. She never accepted the marriage and clearly said no to marriage at the time of Nikah. She kept asking for divorce and her husband would say OK. In one conversation she told him, she would not come to him and does not want to keep the relationship of marriage. He said OK and replied, he would not come to her either. It's been 20 years since and they have no marital relations. They do not live together. It's the nikah/marriage still valid our broken ? She has not received any mahr after marriage and she doesn't want anything from him.

How to look for a spouse

Q:

1. What is the correct way to find a man or a woman for marriage, according to the Sunnah?

2.  Who can visit their houses (of bride-to-be or groom-to-be)?

3. What are the qualities that are given more importance in them?

4. Is engagement function is allowed in Islam (that is exchanging ring)?

5. Is it prohibited in Islam to have oral sex?

Income of an insurance agent

Q: My husband works as an insurance agent. If he invests his earnings in a business or buys a house to give on rent. Then is the profit acquired from such business or the rent got from the house going to be halaal for us. If not then why, because we are all depending on him? Please answer in the light of Quran and Hadith.

Wet dream

Q:

1. If a man has a wet dream and finds wetness on his garment but the wetness is less than a diameter of 2.75cm, is ghusl still necessary?

2. If a man finds mazi of a diameter less than 2.75cm but he does not remember having a wet dream, is ghusl still necessary?

Marital problems

Q: I am so stressed. I want a divorce from my husband but he is not agreeing. We had a secret Nikaah nobody knows about it till now. Now that the situations are worst and I can't continue to be his wife, I asked for divorce but he is not agreeing. Please tell me a wazifa which could help or anything. Please help me in this critical time please. What should I do?