Losing focus due to an extreme lack of sleep

My job performance is starting to slip, and it’s all because I am not getting enough sleep.

I am only averaging about three or four hours of sleep every night.

Even on the weekends, I rarely sleep longer. My girlfriend and I have been fighting every day and night. The arguments start the minute that I walk through the door. It’s been six months since I cheated, and I say I am sorry every single day. Still, it is not enough. I’m starting to wonder if we will even make it to the other side. My boss has been very upset with my job performance. I can’t give 100% to the HVAC company, when my mind is on everything else in my life. I am late every morning and I am barely completing all of my work. I was sent out to a commercial job yesterday to fix a boiler problem. I was on the job for 15 minutes before my girlfriend started texting and calling. I don’t know what set her off this time, but she was angry, screaming, and crying. I know the owner of the company heard me on the phone, and I am also sure that he will probably call the owner of this HVAC company and make a complaint. I can’t blame the guy. He called me to fix the boiler, not sit on the phone and argue with my girlfriend half the day. I know things at home need to change, but I don’t know how to fix the problem. One of my coworkers suggested counseling for couples, but I think we might be past that point already.