You do understand that we, as humans, eventually heal? Maybe not back to "like New" condition, but we all get better as time (& yourself) allows...

Perhaps you will break his heart someday. To hell with "perhaps", you will. It's part of the learning curve. Just don't break your own spirit out of fear that you will hurt somebody.

LS seems to be enjoying the ride, you should enjoy it with him. So you've made mistakes, everybody does; the worst mistake you could make is to let the hurts of the past keep you from enjoying the present.

(BTW, I'm better at giving advice than at taking my own )

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Plug me into somethin'

If the theory does not conform to the facts, then the facts must be discarded.

No good deed ever goes unpunished

Never argue with an idiot. He'll drag you down to his level, & beat you with experience.