Hi Simon! Welcome!

You've come to the right place. Your story is familiar to many of us around here.
It sounds like you're doing a lot of the right things. You've been seeing a counselor. You stay active and engaged in activities you enjoy. You keep up relationships with your daughters.
It is hard not to view happy times with skepticism, especially when you know the cycle. But I don't know that it's wrong to be wary. Don't let your wariness keep you from enjoying the good times, but I think it's good to be aware that this could be temporary.
I understand about not being assertive, about respecting everyone and being conflict-avoidant. That's me all over.
What are you wanting to be more assertive about? What sorts of boundaries are you wanting to implement?