I just want you to know that I still love you with all my heart, and even though we don't talk anymore, I still think of you every single day. I miss you and still want you back but I know you're with him and I have to respect that.
If you look at the chairs it's the same chair. What if Jenny crash landed on the Dalek asylum and the fall caused her to regenerate? Also, since she is a Time Lord, what if she somehow figured out how to time travel?