It's ok to have a positive attitude but you have to keep your expectations low. My ex and I had sex until she moved out. It doesn't mean anything. By the time you get here 90% or better of these sitches end in D.
Just because you D doesn't mean it's over. At minimum 50% will regret it. IMO the number one misunderstanding on this board is the timeline. We we say marathon that means 3-5 years not 3-5 months.
Believe it or not you actually decide when it's over.