If you’re dating someone who was cheated on, and they constantly act jealous, question you, accuse you then get angry at you for not reassuring them…

That's too bad, 😔 sounds like he hasn't worked through the bitterness and hurt yet. Tell him you both need a break so he can work on himself. Right now he has nothing to give until he can let go of his past. He's becoming toxic to you and his own self.💕💙