What I would encourage you to consider is how he reacts when he isn't reassured? Is it passive aggressive until you come back into line or have you never fully stood up to him.
Attachment disorders can range from mild to full blown personality disorders so another factor is where he is on the scale. At the furthest point the person can almost be parasitic such is the need for reassurance and attention. Whilst he thrives you are depleted.
I naively changed my behaviour (along the lines that others are suggesting) however it caused Ex to become abusive as a way to reassert control. He was as I discovered later pretty far along the disordered scale and career success increased his level of entitlement.
Not getting his needs met (even when they were irrational) felt like such a threat that he resorted to conflict which is the lesson he learnt as a child. He actually thrived well in conflict since it was normal for him but it caused me to feel drained and then when it continued over a long period of time, physical ill health.
I would just advise caution as Ex was outwardly very gentle but underneath he had seething anger and a real hatred towards women. I suspect that women who are insecurely attached are less likely to become aggressive but this is more likely with men so womens experience will be different to men. Ex never felt he had a disapproprionate response as to him the threat was very, very real. Such as you making a comment about not going out.
The test of his ability to change is if he has genuine insight and knows that his behaviour is damaging and his empathy will cause him be motivated.
Please don't assume he has empathy as if it was not shown to him as a child it is an emotion that he will struggle with. Ex was good at pretend empathy "oh dear" type statements but his actions rarely matched his words so test his actions, not what he says. I stayed for longer because I felt he could be fixed and I thought he had the capacity for change. Both of those reasons were false.
Outside of this we should have had a great life, thriving children, wonderful lifestyle, physical attraction to each other and compatibility..hard to walk away from but I knew I was being harmed and he had started to triangulate the DC when I wasn't getting back into line.
How old are your children?