How to make my wife fall back in love with me?

My wife recently told me she wants a divorce. Until now I haven't been the perfect husband. Never cheated by the way. I have just spent to much time with my friends and on my iPhone looking at stupid crap. I realize now how selfish I have been but she says it's to late and that it's over. I love her and my kids and don't want to leave. HELP PLEASE!!!