IMO, you are not being harsh, and I agree with the above, it's smart. There was no reason for him to lie to you about the ex gf if it was innocent. He's hiding something, I do believe. And I do think he's planning to break it off if he wants to see you less. He may still be involved with the ex, for all you know. Wise to just break it off now and move on. Yes, trust your instincts here. ((((hugs))))