I just feel like I've done so well and I've got rid of who hey wanted me to get rid of which took a lot for me to do
You have done really well, ending an abusive relationship is very hard, but it sounds like you’ve done it because they told you to, not because you recognised the harm being done to your child and to you which means you could easily find yourself back in the same position with your ex or someone else. 3 months away from a 3 year relationship is nothing really, you’ve still got a way to go in terms of your recovery and your sons.
I can hear what you’re saying about counselling, but waiting for 6 years for support is too long and your son at 12/13 may be much more aware of your distress while going through counselling than he would be now. And you’ll be carrying all that trauma and distress for another 6 years, which isn’t great for you or your child.
You need to look at what you’re being asked to do under the CP plan, and why - as in what’s the impact on your child’s safety and well-being if you do/don’t do it. The plan is literally there to protect your child, and working with the plan is about giving him the best chance of being safe, not about ticking boxes to get SW off your back. If they didn’t need to be involved, they wouldn’t be - they have a thousand other things they could be doing, so there will be a need there, even if that’s hard for you to acknowledge.