I'm right there w/bttrfly in saying that I'm sorry he rained on your parade. I don't think what he said was about feeling threatened. I think he's so miserable, he didn't want to see you happy about your new job. They are some jealous and resentful people, especially when others are happy and enjoying life...they can make a sunny day look stormy in a heartbeat if you allow them to do so...don't give him that satisfaction.

What matters is that you are happy and the new place is far better to work in.

Sit quietly, the answers will reveal themselves when you least expect them to.
The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.