I'm with everyone else in saying it's none of my business etc...

If I had to guess I would say that when you started TG he was probably hurt that you didn't ask him to be partners (assuming that's the case and assuming you guys were really close).

If you did ask him and/or discuss it he probably felt that your business was going to become a threat to his own livelihod and was upset that you put business before friendship.

No judgement here. Just trying to understand the response.