Pray Husband Won't Abandon Me

Pray husband won't abandon me. I'm married 17 yrs & been very sick the entire time. 2 months after we first married in 1995, he admitted had an affair with a young women from church, this really hurt my TRUST ... & recently he's been coming home late from work..I know somethings wrong ... please pray for my marriage bed to stay undefiled esp since I 'm so sick & dependent on him to drive me to doctors etc I couldn't cope. God Bless