Sex and relationship

No, he does not have arousal problems; he's not depressed, but sometimes he's stressed. About cheating? I don't know. He's home almost all the time except when he has some emergency at work, he's late just for a couple of hours, and he calls if he's late always. One time about two months ago, he left really early because he said he can't sleep and he did not want to go back to bed or else by the time he goes back to sleep, it's time to get up. He works in an oil field. He's gas operator. I told him that time it was really weird that he'll leave that early. I told him that was he going to someone's house or apartment? He answered me, "Don't be stupid." When he got to work, he called me. He said either he'll stay in his little office or he'll stay inside his company truck and watch the snow fall. We live in Bakersfield, CA and snow is a rare occassion. I don't know. Sometimes I have suspicions he's cheating, but I can't prove anything because on weekends he's always home except when it is his turn to work weekends. They have rotating weekend schedules once a month. What's bad is the company provides them cell phones so I could not tell if some woman calls him or text him. When he talks on his phone, it's always someone from work needed help for gas leaks, gas pressure, etc.. I've never seen him text because I know he has no patience for that, and one thing, I don't know how to check his text message. I was gonna ask our daughter to check his phone if his phone is in our bedroom or bathroom. Maybe I will have to do that. There are other women who writes to him on his email, but it was in junk section. They said he saw his profile and they like it. I am triying to look for that site but I can't find it. It really makes me not sure because he says he loves me and he's fortunate to have me as his wife, and there's none like me.