That was sad and I bad way to end the series I know now that with cartoon network being bought by another company it is now highly unlikely for a retutn of the series and a proper ending that explains every fans questions is Terra back was that her? Or is she out there somewhere?
I think she is her and she is trying to tell beast boy to move on.
I still say it is sad,And is that it? Beast boy ends up all alone?
The lonely hero? and what of Terra is her appearances in the show over?
Does she change her mind and join the titans?

I don't see anything bad in the ending.

Also, she is not terra. This girl and terra just have a little resemblance of appearance.

For more info, read the wiki:
http://teentitans.wikia.com/wiki/Things_Change

According to the forums it said that in the comics her brother Geo-force tells beastboy it is Terra and the lines in the cartoon; "things are not as you remembe"' suggests it is her as well as the line "things change.The girl you want me to be is just a memory."

I was sad when I watch that episode dude but I watched terra back and she join the titans