Seperated and confused

I have recently seperated from my wife and am living a few miles away in a rented flat. We have 3 sons 16,13,& 8 yrs. There were no third parties involved in this, I just grew exhausted by her constantly being out partying with her work colleagues or friends. I have a job that sees me working 7 on and 2 off, it pays well and we used to spend time together on the days we had off. In the past two years however things went downhill rapidly for me when she would go for days instead of nights out and any time which we may have spent together was sacrificed to her increasing `social circle of friends`. It was not uncommon for her to go out 3 of 4 weekends and people who used to be `our` friends would comment that she seemed to have a very active social life especially as she posts everything on facebook, indeed one really good friend said that of 92 photos I was in one with the boys on her `wall`the rest were of her partying. I just broke when 6 weeks ago she and two other younger girls went on a shift `stag doo` which was an overnight stay. She left at noon on the Saturday and rolled in blind drunk at 3am on the Monday. No reply to txts from me or the boys, she had returned home at 5pm on the Sunday and rolled onto a `hen doo` in a pub not 2 miles from our home. I suggested that the relationship was over the following morning. She put up no resistance and agreed. I asked her why she seemed intent on ruining our relationship, and did she not realise how worried we were ? She responded : `I can`t help it if I have a large social circle of friends and like going out` then `There is almost nothing to do in the house as you do most of the cleaning` it goes on.. `I can`t help it if you don`t have as much friends as me and don`t go out as much` nearly done.. `and you dress like an old man` I found this so absurd that I laughed and walked away from her. We ignored each other for the rest of that day however the following day we began to talk of finances and she was surprised that I didnt want much from the house (which is nearly paid for and managable on her wage) and we agreed joint custody of the children. She insisted that I still sleep in our bed until I moved, I slept in the fold bed downstairs. That night she went to her best friends (of 6 months) our neighbour and got drunk on vodka. The next morning she suggested we have a trial separation. I initially agreed however she refused to talk further only suggesting that she would `be there` if I decided I wanted to go back to her. I am now settled into my flat, the boys like it and once the bank accounts are sorted out next month I will be independant. I am going to have one more attempt at talking to her this Friday. We have good marriage guidance through our work, and I am open to taking things slowly to see if we can rekindle what we had, which was for the first few years the best of my life. If she tries to fob me off with indecision then it`s over for me all together. I am 42 and she is 45 (and as for the `old man` tag my eldest boy wears my voi jeans and lacoste t shirts !!) I just hope I am doing the right thing, but am clear that this had to be done. I will always be there for my sons but being so disrespected from the person I believed to be my soulmate broke me and I refuse to be pained in this way.