Haraam relationship

Q: I am going out with a girl and I knew her from the internet and we didn't meet yet. I tried to stop but she is a Muslim but her parents aren't that good in Islam. But she wants to get better in Islam so I didn't stop. We decided not to meet until we tell our parents, so I don't know what to do. Tell me what to do please?

Azaan

Q: Please advise regarding the Azaan:

(1) Should Masnoon Dua's be recited during the Azaan? For example, the Masnoon Dua's for entering the Masjid, when boarding a vehicle, when leaving the home and so forth.

(2) If a person is standing during the Azaan, should he remain standing until the Azaan has been completed before he sits down/performs Salaah?

(3) A person enters the Masjid just before the Muazzin is about to commence the Azaan. Is it correct for him to commence Tahiyatul Masjid or Sunnah Salaah at this point i.e. a few seconds before the Azaan? In this manner, almost his entire Salaah will be performed during the Azaan.

(4) It is often observed that those who arrive early to the Masjid (much before the Azaan and within the Salaah time) only perform their Sunnah Salaah after the Azaan has been given. It gives the impression that they were waiting for the Azaan in order to perform their Salaah. Is this correct?

(5) Should one greet a person with Salaam and shake his hands during the Azaan?

(6) Should one respond to the Salaam of a person during the Azaan?

(7) Can one verbally inform others to keep quiet during the Azaan whilst the Azaan is going?

(8) Should one respond to the Azaan heard over a recording or live streaming audio?

(9) Should one avoid 'answering the call of nature' during the Azaan?

Joining two Salaahs

Q: I have heard one is able to join prayer like zuhr and asr when need be. I am a student and I can never get any work done at home so I go to the library. Only the time between the two namazes are like three hours. Is it ok for me to join the two in this case because that gives me so much more time to sit there and get my work done?

Performing Tawbah Salaah

Q: How do you make the niyyat and pray the prayer of repentance. I have heard you make wudhu and pray two nafil. But what do you say in the niyyat exactly and is there anything special you say after the namaaz? Also can you make wudu for Esha namaaz, pray the repentance namaaz and then pray isha right after with the same wudhu?

Making tawbah from zina

Q: I did a terrible terrible thing. I cheated on my husband. I slept with a whatsapp contact of mine twice. I know I did wrong and I am so sorry for what I did, I mean it was a total stranger. My husband is taking this very hard and I know he still loves me and I am thankful for that. What can I do to revive our marriage and make my husband look at me the way he used to before he found out. Will things ever be the same again?