Oh yes it makes sense. Where was your mother in all this? Am I guessing right that she may have been a codepenant in the relationship?

If you want the texting to continue, I think you shouldn't play to the immaturity of what comes from your father's side. Respond back as adult/professionally as you can. If you are already doing this - Good Job!

Be honest with those around you - it will lead to you being more honest with yourself.

As for keeping in touch at all, I think others here can answer better. I have a gut feeling quick response to that based on personal experience. I'm afraid I can't give you a level headed reply other than to put yourself first here. You are not responsible for how he chooses to maintain a relationship.