No, everything ends eventually. So on that logic you’d never start anything. You just hope that whatever it is lasts as long as it’s good. It was originally a choice of 2 options, so that’s why I went that way. Personally I’ve started lots of things in hope more than expectation.....
Always ‘knowing you’ll never fuck them again’. That assumes that it was great. But missing something you had is always more difficult than something you’ve never had. The future is something ephemeral but history is concrete.