I’m sorry you’re feeling down. It’s terrible to feel rejected.
I feel like you avoided the advice of the board, and got burnt as a result.
You need to scrub what you thought you learned from this board, and start again from scratch.
If you thought one dinner date, a massage and sex was going to fix an entire relationship, perhaps you haven’t studied the welcome thread, read all the links, gone to IC to look at yourself, and haven’t the foggiest idea that what you are dealing with here is a 3, 4, 5 or 10 year battle - which, most of the time, won’t end in reconciliation.
There is no quick fix here. There’s no pushing or seducing or cornering this person into loving you and wanting to be with you.
You need to go back to the welcome thread and first principles. DB, separation, divorce/reconciliation is an oscillating, winding journey along an incredibly long road. You’ve barely turned the key to start the ignition.