I've completed the quests with Serana and she was following me for awhile, a great follower at that. Then I convinced her to go get cured of her vapirism. She left my service and met up with her again at Ft Dawngaurd. She followed me for awhile until I had the need for her to leave me for awhile while I took care of some unsavory matters, like feeding so I could cure my vapirism (I'll get to that failure in another post). When I met back up with her at Ft. Dawnguard, I can't get the dialouge option for her to follwo me again. I really want her as my companion again. It started before the 1.9 patch, but has continued since. I tried deleting and relaoding Dawnguard. I tried depleting Serana's health saving and restarting. Any ideas? Thank you