Hi, I would like to share some things that happened in the dream I had last night.
In the dream I was with my girlfriend in some kind of shopping mall. She was telling me all the time that she was dreaming and that I was too. She said things like: look what I can do as this is only a dream.
I realized y should do a reality check just to be sure and get lucid. I tried jumping and floating but nothing strange happened. I tried looking at my iPhone screen, looking away and looking back again (this reality check usually works very well for me) but everything seemed normal. In the meanwhile my girlfriend was doing cool stuff and telling me: You see, it's just a dream, I just changed the object I was holding and you didn't even notice.
I even imagined my girlfriend sinking into the ground and disappearing and it happened. Then she reappeared coming out of an elevator and telling me what she had just experienced. It was very strange. I knew it could only be a dream but it was as if I believed it was her dream and she was the one being lucid. Therefore, I couldn't do what I wanted to in the dream.
I knew I was dreaming and for the first time this didn't make me wake up. But as my reality checks didn't work, I think I might not have been lucid enough or even not at all. It was as if I had just been a passive observer of the lucid dream she was having.

Has somebody experienced something similar sometime? Would you say it was a lucid dream? Would you say that the fact of me imagining my girlfriend sinking into the ground and then reappearing and then watching it happen is a proof that I was lucid and could control what was happening? Why didn't it make me completely lucid although I perfectly knew it was a dream?
Finally, could anybody tell me why my reality checks wouldn't work or at least wouldn't make me lucid enough?

PD: I just remembered, that at some point I flew from one point to another point just to make sure it was a dream (it might have happened in another dream I had during the night though) and it worked but it didn't make me really lucid.

Thanks! I hope my experience hasn't been too boring^^