Is nikaah still valid after being separated from husband?

I have been staying separately from my husband for a year now. We have not initiated any divorce proceedings but we have had various issues which led to us living separately. We are both currently living with our parents. Amongst the issues we have had included family issues, trust issues, and Sunni and Deobandi clashes. I am a Sunni Barelvi Razvi mureed and my husband says that he is just a Muslim. However he is known to associate with friends and Ulema having Deobandi inclination. We have not had any physical form of contact in this year, I am not sure if we had to divorce whether I would be required to observe the normal Iddah period or not. Also, recently I have been feeling lustful and spoke to him about it, however I am not sure if I long to be physical with him or that I am just feeling lustful. I know its not wrong for me to have discussed these feelings with him as he is still my husband. Would it be wrong if we both met to satisfy our lustful desires, I think that since we are not divorced we are stil halaal for each other.