I think first you have to trust yourself to understand that HE is NOT your father. He hasn't shown any signs of leaving you in the lurch, unless you continue to act irrationally -- and he's told you that. He isn't being dishonest or sneaky.

He WANTS you to trust him. He wants to have an open relationship with you where both of you can talk about things ~ and be rational. He expects when he tells you something, that you'll trust what he says.

If he has ever shown signs of lying to you, then I would understand. But if he hasn't, then you're going to have to learn to trust him. If you've been with him for a year and a half, and he's stayed all thru this, then I'd say he's a pretty good guy. Hang onto him.

God bless and take care. Hugs, Lee