I think that she stopped loving jess that night with dean. Jess had come back and visited her at her dorm the night before and she told him that she didn't want to be with him. It was the way she said no that makes me think she had stopped loving him. As much as I want to think she still loves jess, i dont think she does.

I don't think she ever truely stopped loving him. Did you see her face when he showed up in front of Emily's house? Or when Logan tries to put her arm around Rory while Jess was there she tries to pull away. You could still see something there.

Also, part of me kind of thought she slept with Dean in a sense because of Jess. Let me explain, I think after telling off Jess she instantly regretted it but he was already gone, so she turned to Dean because he was there in hopes of forgetting Jess. But we all saw how that worked out.

I think they always wind up come back to each other for a reason.

Celestial dream you could be right - she did look really happy in s6 when he returned. It was a magial moment.

here is the thing when you love someone i think a part of you always will love them (unless they had been seriously lieing to you or something then you will always love the person that you thought they where) you may get over some one or hate them but once you love them you will always care about them and love them, you love them at the very least as a friend

at the very least she never stopped loving him as a friend

What they had, I can't describe. It was intense and young. Jess never stopped loving Rory. Maybe he didn't handle it the best of ways, but that's what drove a wedge between the two. Rory stopped loving Jess on the intimate level. I think she loved him, but she wasn't in love with him.

How would Rory stop loving him?

To me, she tried to convince herself that she could forget him since the phone call on her graduation day as she tried to deny her feelings until the dance marathon.
I don't believe, as Celestial said, that she slept with Dean because of him. She was sad but she just thought that Jess was guilty and that it definitly ended.
However, of course, everytime he visited her, we could still see there was something. And, of course, she never stopped loving him as a friend. But, to my mind, she was always touched by Jess's love and always asked herself if she really stopped loving him...
This is a great unanswered question! So it's about love...