Milk Snake Questions

[GarterPython]

Hey I know that I'm just worrying to much but my Pueblan Mill Snake will not eat and on the sheet that shows all f his previous meals he hasn't eaten for almost 2 months. When I offered it to him he did not show any interest what so ever and my dad said to try an feed him in the next 2 days and if he doesn't eat he is just going to take him back. He doesn't think a snake should go off feed that long but anyway do you have any suggestions of why he isn't eating or maybe a suggestion on how to get him to eat. And he is on Frozen thawed pinkies. When I offered it to him he literally just ran away to the other side of the cage and started to burrow.