The upshot for me is that I no longer trust him, and as a consequence I don't properly love him. That made me feel a bit emotional, you must be really feeling it @AspergersWife it is incredibly sad to be at the stage of wanting to end a marriage, that you’d really wanted to work. You have tried and tried. I agree I think the therapist seems to be taking things slow but even if she is treating you like unique individuals, without labels she could still be cutting to the core - on of which is how lonely you are, how much he just leaves you whilst he gets social and interest satisfaction from gaming - how the heavy lifting of parenting gets put entirely on your shoulders - and how he gives a little bit temporarily and then reverts back so you cannot trust his commitment to you. 
Our experiences are so different aren’t they too, as well as being similar. DH is a very successful person, in all areas of his life. He’s ruthless - or in his words he just thinks of social relationships as a kind of maths equation or computer program (he’s a programmer). You put the right inputs in - you get outputs.
He has learnt that despite being painfully shy, geeky and socially inept when younger - and the girls shunning him - that his attractiveness has increased now he earns so well and has learnt what to say. He has a stock of phrases to send women that produce good ‘results’ (input = output). So to him, ending our marriage is OK because he will be better off if he does. He has money, he has social tools, and because he’s so good at his work now and hobbies, he has a bit of a following.
Of course that misses friendships or relationships at a deeper level, but does he even need that? I don’t know. He said he didn't remember ‘love’ from his mother (who is very emotionally detached) - but would be there to make dinner just didn’t have any need it seems to bond - I’ve never seen her show a single emotion. So perhaps he’s learned not to live with love, and all the trust, compromise and commitment that goes with it.
So I do look to the future in some fear. I think I’m very likely to end up on my own. Because to be frank I am a crushed person and I no longer trust as I once did. It would take an amazing man to take on me, a middle aged woman with a child who will never leave home and who is deeply attached to me. (DS is strongly bonded to me and his sibling, very loving, and caring so against the stereotype of autism).
Whereas I think he will do very well. He cannot be without a woman at home, or female attention, and he will get both.
It helps me to be clear about my and his future - it’s not fair and it’s not pleasant but it’s how it is. I think in a way it’s helped me to be more realistic. My priority is me and DS and as long as we are both happy and healthy, then if I never get someone else well so be it. It’s awful to be in a marriage where I felt like I had totally disappeared. DH gave me so little attention or love. He stopped telling me he loved me about 3 months before DS was born and rarely said it since. Like a switch gone off. So in a way a future where I can just let that go has got to be better.
@Sunnidayz don’t beat yourself up about not leaving earlier. We could have all left earlier! However I tell myself that loyalty and commitment are good traits, not bad ones. It’s very hard to leave. It sounds like you’ve been unhappy for some time. You say that there are good things but they seem to be fading into the past? It’s only when things were bad, and he wanted you back that you got some of that attention and love again. That’s no way to live. Perhaps coming on this thread will help you clarify your thoughts.