Hi Newlight and Welcome!
I'm sorry to hear about the difficulties you've been experiencing with your partner and am so very glad that you found this site. The community here are very supportive of one another and many are in similar situations and can relate to your feelings.
You will also find a great deal of helpful information in the articles, lessons and tools, so do take a good look around. The basic tools for this board are here

if you've not already had a read. They give you a good basis upon which to start to make further improvements and may contain some gems you've not discovered in your other learning to date. I hope so. You'll find the experiences of others will help you to feel less alone in the situation, which was extremely uplifting for me when I first arrived, so keep reading and posting. Your own story will help others too.
8 years is a long time to struggle with the behaviours you describe so firstly recognise your own resilience and strength. That love-hate-remorse rollercoaster you refer to really is very challenging emotionally and can take it's toll on the strongest of people. It is understandable to be feeling as you do after such a long and difficult r/s. Are there any children involved?
I'm so pleased to hear that you recognised the impact on yourself and took positive steps to benefit your own well being and ability to cope. This can be very difficult to do when you are involved in a demanding and all consuming partnership with a loved one. I have great respect for you for focusing on yourself as you have.
You mention that your partner is unlikely to consider joint counselling. How about seeking help for himself to cope with his own struggles with his emotions and to strengthen your r/s? Would that be something you think he would immediately reject? A person has to be willing to seek help of course, otherwise it is not likely to be very productive. You know him best.
What would you ideally like to happen from this point for yourself and your partner? We will be here to support you.
Love and light x