C.P.
This is tough, but it is doable! My advice would be to start slowly. She will cry, like she did last night, but stay gentle but firm. Nap her in her pen in your room, if she still naps. Love her, hug her and kiss her when it is bed time, but be insistant that she go in her own "bed" (her pen) when it is bed time. She is going to push the limits and prob pitch a fit, but once she sees that mom and dad are insistant that she do that and she knows and feels that she is still loved, she will eventually figure out that its ok to sleep by herself! Unfortunately it will prob mean a few nights with little sleep, but it is worth it for all involved. One thing I would encourage you to do is begin spending time with her during the day PLAYING with her in her own room to get her used to the idea of being in there and having fav corners she likes to hang out in. She'll figure out that its fun having her own space!
Hang in there! I hope that this helps!
C. p