I have to say that the best advice is DO NOT TAKE ANYONE'S ADVICE!
Bro, I will tell you that I have been in the same situation TWICE!
The reasons that both of my wives were unfulfilled was my working so much overtime (at there insistance) because of trying to provide a good lifestyle.
My first wife left after 1 1/2 years basically the same way that yours did...She started clubbing and doing shit that just was NOT the woman I married. Anyway, I took everyones advice, I tried everything that everyone said and it only made the situation worse. We ended up hating each other and things have always sucked between us since then and it has been 18 years.
My second wife, started an internet affair,after 9 years of marriage, with a dude who was 1500 miles away and in another country. It was all because she was basically lonely. when I was home, I was too tired for much of anything....the rest of the time I was at work. It is not an excuse, but it is a reason. She always begged me to work overtime so we would have more money. Anyway, I was blind for a year about the situation, the next year was miserable as hell while we lived together, after I finally found out about everything, I literally called her every name in the book, threatened to kill her and just about anything you could imagine. I tracked the guy down, drove to Canada with the solel intentions of murder on my mind...He seen me coming from a distance and I was not able to keep up and I never got my hands on him. After that, she moved out, stayed out for a year...would not give me a divorce. I just basically got on with my life, I waited on her to call me (which she did quite often). I kept telling myself how I could never have her back since she was now ruined or spoiled (in my eyes).
After a year, she came begging to come home, admitted her mistakes. We did a lot of talking (I did a lot of soul searching) about how I don't think I could ever trust her and all that shit. I told myself that I would take her back just so I would not have to pay child support for 10 years. But I can tell you from experience, WOUNDS HEAL! Things are better between us than they have ever been. I am not going to lie and say that I have not thought or dreamed about her screwing around...It still makes me sick as hell ...but I live with it and we are happy.
All I am saying bro, is go with the heart...Don't listen to everyone else. If you think you might want to try again if she is willing, then try it so you will never have second thoughts and wonder what might have been. But then again, If you don't ever want her around anymore...then move on!
It will be hard either way. I am just like you in the fact that I like being married and not having to come home to an empty house. I proved it by getting married a second time. BTW, we will soon celabrate out 17th anniversary.