<human>: Give me a shortened version of the text

Me 27M dated a 27F for 8 weeks. She ended a 6yr+ LTR approx. 9 months ago, dated one (WEALTHY****) guy who didn't pay much attention to her in between(3 dates in 3 months), met me 3 weeks after "ending" it with him (not sure what that means).  We dated for a few saw each other at least once a week. Physically and mentally intimate. Seemed to share a lot about each other's personal life/history together. Both commented on the feeling of being connected. I was thoughtful/generous/attentive. Thought coming out of a dating situation where she was ignored I'd show her she was important, that I was not like her past.  See her one night, physically intimate. Wake up next morning, kiss goodbye, I get cheek.  Text her a few hours later, she put treats in my lunch bag. Text her thank you shes so sweet.  Honest about a friend (PLATONIC) who texted me who wanted to hang out but I haven't seen her since me and this girl started dating (I think she saw the text so I just addressed it, said I wanted to be open and honest, because I am. I think she saw the text "doing anything this weekend"). What follows is  "you should date others".  Text few days later, "you did nothing wrong, I don't see this going further". NC since.

I'm confused. Think wealthy dude came back. Everything changed within 7 hours. I was kind of into her. Felt like there was potential. Not broken up about it, just confused. Maybe I was a rebound? Used for sex?  If she contacts me, should I respond? If I thought she was special, any ways to salvage? NC for 3 weeks so far.

Girls -  Is being a nice guys (genuinely) a bad thing? I like making whoever I date feel valued/special. I'm romantic.  Am I really supposed to ignore and play the "game".
<bot>: 27M dated 27F for 8 weeks. Thought it was going somewhere, ended VERY suddenly. Did the rich dude show her attention? Can friends talk their girlfriends our of relationships?