dont leave him, it could be the biggest mistake of your life, my girlfriend left me same story, 2.5 years dating but 3 in total, she also had a coworker who liked her for about 5 months, then bam she left me for him , acted like she had no emotions, nothing, I chased her, then I just went NC, this guy was just a fronter putting on a sad story which made her like him and feel sorry for him. anways. now they are split up she disappeared, then she showed up at my house, she looked disgusting. not that fit good looking girl I loved, she looked like a hooker, scrawny. lots of make up. I could tell she was drinking lots of wine and drugs because her nose was all red. and she was crying telling me how she made a mistake, how she stopped taking care of her kid and she wanted to see my kid too but I said no.( girls were the same age) she said she wanted to be a family and she's done letting loose, I told her that I built this life origionaly for me and her, but she left and wanted to party and be with mr wright, she went down hill. I went up, I now have a nice big home, hot tub, a second vehicle, and I'm in my 3 year of sheetmetal. I drove her to her parents house, who I once new very well, because we were once family, they were happy to see me, but not her. I ran a bath for her and then I had a long talk with her parents, they said her new friend whos a girl,(the one who convinced her to dump me for him) stopped being friends with her and conviced her NEW boyfriend to dump her, so she was even more of a wreck, doing coke and crack and drinking, her parents almost begged me to take her back, but I said no, I said I love her and it breaks my heart to see her like this, but when she dumped me, she left me with all the problems. I even just had a family member die, and I begged and cried, she posted pics of her and him on Facebook the next day, threw our little family out the window. I said if she would have came back way sooner, I would have tried, but now she is not that same person anymore, I don't want this to happen to you or anything bad, my own story sorry if its too long lol. good luck.