You should never attempt couples counselling with someone who is emotionally manipulative and controlling as they use it to further control you. Encourage him to go for counselling on his own, he has major issues that he needs to deal with himself. He should not be in a relationship, he’s so insecure despite being with you for years that he resorts to controlling behaviour dressed up as ‘love’.
My first relationship aged 18 when I had moved town to attend university was a controlling one like this. He also did lots of lovely things while controlling my behaviour by getting in a strop and threatening suicide if I attempted to see friends or visit my family alone. Made me miserable in the process as I was so smothered and controlled.
It takes a long time to get out of a relationship like this as the more you pull away the tighter they cling on. I knew I wanted rid of him within 3 months, took me until 18months when I was pretty much totally isolated from everyone to tell him I was done. Unfortunately I was living in the same house but luckily with 6 others, he had changed all his courses so was in the same classes as me, we had the same friend group. After breaking it off he stalked me, would break into my room at night, would find me out in town and steal my bag or my keys from me, would follow me around shouting at me, he repeatedly threatened suicide, was incessant. I did feel guilty and partly blamed myself as he was an expert in gaslighting and making out if only I could behave differently he wouldn’t be the way he was.
This was his problem though, not mine, he had a mh breakdown in the end (common in these cases as well) and luckily went home to his family 300 miles away. I have never been in a relationship like that again as I recognise the signs very early and dump.
Please take time to work through this with friends and family or people you trust, it’s very dangerous leaving someone like this. Read up about coercive control, there are lots of very good YouTube videos about controlling people like him. Talk to your counsellor but ask if she has experience with dv and coercive control as she shouldn’t be suggesting trying to get your independence while still being with him as he’ll react very badly to that. If possible in these cases I think when you’ve decided to go you have to do it without him knowing, get somewhere safe and then tell him.