I can so relate to this. My H's OW's H died last September. So my H is feeling like a hero to her, also. "she doesn't have a lot in her life" BS I say. I don't think she's as needy as H likes to think she is either. Maybe emotionally, but if she can drive a snowplow...than I don't think she's as helpless as H thinks she is thus the reason he'll soon tire of her. She's using him.
I'm not necessarily a needy person either, I'd like to be, but I've had some walls up for awhile.