Does the nikaah terminate if the husband goes to live with a non Muslim?

Q: My question is with regards to my Nikah. My husband left me and our two children 8 months ago to live with a non muslim woman. He now regrets the decision he has made and wants to reconcile. Please advise if we are still in Nikah as I don't want to live in sin. He has not mentioned anything about giving me a Talaq at all when he was leaving, his words were he is leaving me as he does not have any feelings for
me.

Meaning of a Durood

Q: When I think of Imam shafi'ees Durood, for some reason I dislike to say the second part of the Durood, using the amount of ghaflat the ghafil people are engaging in as an amount to send Durood to Nabi (Sallallahu Alayhi Wasallam). In my mind this is disrespectful to Nabi (Sallallahu Alayhi Wasallam). Please can mufti saheb clarify and make me understand how to look at this?

Intention for Salaah

Q: I understand it is a condition of the prayer when following an imam to intend to be linked to the imam. I also understand that the intention should be such that if a person was asked regarding his prayer, he should respond immediately without having to think-otherwise his prayer is invalid. I spend several minutes trying to make the intention for prayer, for example, to intend to read Fard of Isha Behind the imam. Despite this even after a few minutes of trying to make the intention, if one was to ask me what prayer I was praying I am able to respond immediately without thinking Fard of Isha. However, I have think very briefly remind myself I am praying behind the imam. And this happens almost every time even after five minutes of intention making. I am getting depressed over this because apparantly it makes my prayer invalid. Please can you help me?

Remaining perpetually in sin

Q: I had a question regarding committing a sin. If a person does one bad deed then he get one sin but example what if he is doing a sin which is a continuous sin example he is involved in interest or he doesn't keep a beard so is there something like he is getting a sin every second that passes untill he comes out of that sin?