<human>: Can you give me a shortened version of the text?

Background:
My friend J and his girlfriend T were together for 6 years,living together and raising T's daughter, K as a family. J is the only "father" that K has ever known, her bio dad wants nothing to do with her and hasn't seen her since she was 2, she's about to turn 9. J had planned on adopting K legally once him and T were married.

Over the past few months J & T have been having issues that ended with T signing a lease for an apartment behind J's back and moving into the apartment this past weekend. J was completely blindsided by this move, he obviously knew there were issues, but T leaving had never come up. 

Apparently, T had been talking to her daughter K about the move and instructing her not to tell J what was happening.K did however, tell J's Mom (her babysitter) "We're going to leave my bed at J's house so I can sleep there on the weekends." As of right now, T is being very vague about any plans for K having further contact with J, she refuses to answer any of his questions about the future. 

So now that the background is out of the way, my question is, does J have ANY rights to take T to court for visitation (at least) of K? If T should change her mind about J's access to K, does J have a leg to stand on legally to remain in K's life? J loves K like she is his own and it would kill him to lose her. From what I've looked into, it doesn't seem as though J has any rights, but J seems to think he does. I don't want to give him false hope or wrong information either way.

Additional info: J has MS and his symptoms have gotten progressively worse over the past few years.As of now, he's still able to work,walk,talk, etc, but his physical/neurological symptoms have gotten worse, the future does not look bright. We think T is resentful of J's illness and she believes that his MS is going to ruin her life.
<bot>: My best friend raised his gf's daughter as his own for the past 6 years. GF is moving out, does my friend have any rights to continue to be in the GF's daughter's life.