VibeSpreader, I'm sorry but i'll answer your questions selectively, as I have an agreement with my partner that we don't share intimate details about our past.
During our relationship I have never been tempted to cheat, nor do I miss sex with other people. I can't disclose details of my sex life, but I will say that I am extremely satisfied, she is my everything and I feel I have matured during our relationship.
During some of our fights I sometimes have my doubts, I think they are created as a defence mechanism from my brain, but I am absolutely certain that she's the one for me, I could go at length about what makes her so special and so fascinating but I don't think that's your question