JASB - Three years is a long time to be stuck, enduring a sucky marriage with a known cheater/alcoholic, especially when it's obvious he is a repeat offender. If you can put a roof over your head and food on the table, you and the kids have what you need. The rest is gravy. We can all live a happy life without gravy.
Trying to control your WH is a dead end. Let that go. Accept that he is what he is.
But making your own plan is empowering. This will get you "unstuck", give you options. Remember, taking action does not mean you have to make a decision.
But what can you do? Get on the internet and google where to start. Fidelity website has a spiel about what papers to gather in case of divorce. Get a team together: a lawyer, a therapist. Start IC. Reconnect with girl friends. Join the choir, a painting class, or investment group - something that's independently you. Make an exercise routine, even just walking. Start imagining yourself as able and powerful, independent and free. Start imagining a different life, a smaller home. It might be scary, but don't you feel the weight of a bad marriage lessen just thinking about it?
I am very much in the same boat, but older. I, too, spent years trying to have a "lovely life". Poof! Turns out it was never real.
Making and working my plan is what keeps me sane and on track. When I get all woe-be-gone, I remember to work the plan. At first, it was just a way to shake things up, leave me an out, just in case my WH wasn't that special unicorn after all. (Yes, I really believed in his lies at first, needed to believe we'd make it.) First I made a basic list, in order of priorities of where my focus needs to be: my job, care of an elderly relative, grown kids, WH (Yes, he is on the list, but last. ) Tasks, completed or in progress, include: post nup, paperwork gathering, budget, lose a few lbs. (vanity boost because I am a only human), get my groove back (with WH, of course - just so I know I've still got it), and decluttering my large home of 23 years, oh, and learn to play golf while I still have a country club - a place I've rarely been to. Lately, because I can see the writing on the wall, I've added the big one - figuring out where to live when I walk out the door. All but the last item on my list would benefit my married life, if and when WH ever decided do his part. Yet, as the lies and stonewalling tactics become more apparent, I've moved on from wishing for reconciliation to an exit-plan strategy. His indiscretions were too great, his amends too weak, and I'm too old to wait around for the miracle of true repentance. Should WH arrive belatedly to this point, God is patient and will be there for him, but not I.
I've read many save-your-marriage books, searched for ways to set my marriage on a good track. They all require the partner to participate, leaving me wanting but powerless. Then I started reading Cheating in a Nutshell, Leave a Cheater Gain a Life, Too Good to Leave - Too Good to Stay.. These books gave me a sense of power.
So sorry you are mired in this mess. One question that helped me to see things more clearly. I asked myself if I had freedom, half our assets, and a decent job, would I choose to join my life in marriage to my cheating, lying, self-entitled WH tomorrow? No, of course not. I would not marry him for "gravy" so why would I stay for gravy? It's the same thing. So, there's my answer. Letting go is scary, I get it. I am allowing the seeds of a new life take root in my imagination.