Giving up.

I'm so fed up with my daughters sleep , since 6 months it's been not easy to get her to sleep , before nap time or night sleep I just sit with her so she gets super sleepy then we go to bed and in bed it's different story , she just becomes so active , she crawls, she stands and rolls , I am physically holding her , she don't like it but that's only way I can get her to sleep, sometimes I let her play in crib to see if she gets tired and sleep, but she never does , feels like she wouldn't sleep at all if I don't hold her down . Just feels like she's old enough to set herself to sleep without my help