Logically I want to move on. It’s like my heart hasn’t caught up. Nothing is fine but we are pretending everything is fine every day. But when I think about saying "you should leave we should break up" the words get caught in my throat.
Leeleelu, it's only been 10 weeks. I know that feels like a really long time (every day after dday is an eternity unto itself), but in terms of infidelity recovery, you're in the very early stages still.
Love and attachment are not switches that turn off when someone hurts us. It's not easy to let go even if we logically know that's the healthiest choice for ourself. Right now, you're emerging from shock and dealing with pain and healing. The wound is still bleeding - just more slowly than it was 10 weeks ago. It's far from closed over.
Will I just wake up one day and be able to say "ok let’s break up"? Why is it so hard ? Help ! It’s exhausting me , I realize I am grinding my teeth with anxiety throughout the day. How can I lessen my anxiety about this, know for sure it’s the right choice, and make it easier on myself ?
A few things helped me with the anxiety:
1. No decision is permanent. If you leave him, you can always get back together with him at some point, assuming he's proven to have changed for the better.
2. There are other people out there who have never cheated on a partner and probably never would.
3. There is no "right" choice in situations like these. There's only what you want for yourself and your future.
Unfortunately, there's no crystal ball to tell you that he'll never cheat again or that another guy you're with won't cheat on you. The only way to avoid that gamble is to stay single, but at least a new partner won't have hurt you in the past.
I forget who said it, but people here talk about getting your heart, head, and gut in alignment. Your head (the logical part) thinks right now that ending the relationship is probably the best choice for you. Your heart (the loving part) is still deeply connected to your cheating partner. Your gut (your subconscious/instinct) is confused, hurt, and terrified of the unknown.
It will take a while - perhaps a year or two, and far longer than you want - before all three get to a place where yes, you will "know" or at least feel a lot more sure of your decision. If leaving is the best choice, your heart will eventually detach and feel much less loving, and your gut will feel at peace whenever he isn't around. If staying ends up being right, your head will eventually tell you that he's done the work, and your gut will feel at peace when you're around him.