Husband being distant

Need to release some pressure! Husband is a firefighter working 24 hour shifts he has been distant and cranky all week and then last night (first night back on shift) I tried to be sweet and take him supper and he acted like didn’t want me to stay and eat with him. I did and as soon as I got done eating he walked me out to the car. He would usually hang around and talk for a minute instead he offered a goodbye kiss through the car window..

Last year He admitted to texting another woman, not sexual I read all the conversations, but I worry he is straying away again..