And therein lies the rub. You're tying your own self-worth to someone else's feelings towards you, effectively handing over control to someone who, by all accounts, sounds like a narcissist.

Whether or not he truly loved you wouldn't have any bearing at all on who you are. You helped him and cared for him because you're a good person. He couldn't see that, and he lost his chance with you. That's all on him.