Do you wake up after your LDs ?

Ive been LDing on and off for about 2-3 years now and it seems like after every LD i wake up , usually when Im in the middle of something . İts not that I cant make the dream last long or anything , I have been getting better at not getting to exited adnd making my dreams clear so I can keep them going , but pretty much after every LD i seem to wake up , which doesn't happen in my regular dreams , at least not always .

So the question is , is this suppose to happen ? Do regular LDers just have an LD until the end of the dream when the dream just finishes ? İf this is the case then what should I do so I wont wake up and carry on the dream till the end ?