I think you need a new vocation. I think you also need to let go of who your sister is dating, if you really care that much about it then odds are she's dating the convict to piss you off. Or not. Maybe he is a perfectly nice convict, they exist. Your brother being weirded out by your father, that's not on you, and if he puts it on you, that's on him.
As for your three men, you need to pick better men, and the next time one of them tries to walk away, grab him by the scruff of the neck and keep him there. You're tired and dead, I get it. That doesn't mean you have to watch the next guy fuck off. Maybe he's just being an idiot, and he'll regret it later. Plus, if he really has decided he doesn't want you anymore after having sex with you once, then if you grab him and drag him back you can have the satisfaction of a swift kick to the balls.