I just found out its over

my fiance is seeing someone else, they got their name tattooed on each other, I can't say I didn't know he's been pretty distant for the last two weeks or so, and everytime we've talked something seemed off, that on top of the very hard time I've been having at work is why I've been so withdrawn. Like work has always been my escape, I'd go to keep busy and my mind off of all of my anxiety and emptiness, but I haven't been able to do that it's just gotten too hard. I'm isolating myself again and I'm really not sure if I'm gonna make it through this dark time again. What's worst of all is I have no support, I have no friends cause everytime I make a connection with someone I push them away before they can leave me. This has proven how right I am the person I trusted to love me did what I try so hard to keep from happening. Im just so lost and confused now, I don't know what to do