How do you get over a son going to jail and not keeping in touch

Don't know that you can "get over" it. If you can learn to live with it, that's about the best you can expect. Lot's of young people don't keep in touch with their parents until they need something. Going to jail is another thing alltogether. That says he hasn't yet learned to play by the rules.

You can't change what he does but you can change how you deal with him. Make sure you aren't an enabler. A good policy is not to participate in any bailout unless you agreed to it beforehand. If he alone makes the decision to do something stupid, he should understand he's on his own. Don't support him, make excuses for him or try to cover up for him. Consequence is a great teacher. Don't deny him the opportunity to learn from this experience.

Sometime when your in prison or jail ( I would know )--You want to sort of close yourself off to the outside world because it's easier that way to forget what you're missing and you can then do your "time" with less worry.