How do you get baby to sleep in crib?!

How do I get baby to sleep in crib longer than an hour before waking up?!!

She slept just fine in her bassinet 6-8 hour stretches waking up once at night but now that she is in her crib she won't sleep for more than an hour or two at most and she wakes up crying. Bedtime is around 7:30-8pm and I get tired around 12am, eventually pull her into our bed because I physically cant keep putting her back in her crib just for her to wake up in 30 minutes. She is 5.5months and the crib is in our room until spring.

Any tips? Moving crib into the other room is not an option right now unfortunately.