Your question isn’t really what you want to know. I think you’re looking for morality advice not the definition of what is or isn’t a lie.
It sounds like you are disclosing your past the best that you can and that means little by little over the course of time. When these disclosures occur, I’d suggest reminding him that you want to be close with him, and you appreciate his patience with your remembering and telling him small bits from you past month by month, rather than in one fell swoop.
As long as you keep the communication channels open with him, I don’t see why he would have a problem with your way of telling him about your past. Just because he wants one comprehensive news report, doesn’t mean you’re able to deliver — but you’re not telling him no and shutting him out. Instead, you’re clueing him in bit by bit.
I hope that helps! 🙂