That is a long time. Sorry. This will take some work reprogramming yourself. It is time for some new habits. Suggest documenting your steps so you do not drift back into those old habits.

Exercise. Get a little better definition on you. Food. Start a healthy diet. Learn to cook if you have too. Cutout fast food. No alcohol. No sugary drinks. Sardines on Toast. Do some single road trips! Social events: Hiking clubs, volunteer to help the homeless, Toastmasters Public Speaking is great (find the right club however) When you have some vacation, take a week trip to Canada, Europe, of somewhere wild in the US.

I look back at the time I was "dumped" and I wish I had spent the time on more fitness activities and more solo trips.

But really appreciate the free time you now have.