Personally, I don't blame you. Although I am married, when my son was little (up to the age 4) I would read to him everynight in his bed until we both fell asleep. Really there is nothing as snuggly!! And now my daughter is 4 and again I still read with her everynight, pet her little forehead and snuggle with her till she falls alseep. Many people including my husband have really given me a hard time about this.
What I have always done, is crawl out of their bed in the middle of the night or when I get an elbow or knee in the face!
What I did with my son and with now my daughter is let them know that our bedroom door is always open to them if they need us.
If I were you, I would simply start by talking to you daughter about her room. Get her all pumped up and excited about the bed that you are going to buy her, "Her Very Own Big Girl Bed"! Then create some fun bed time routines, like reading singing, and saying prayers with her and her dollies. Maybe even have her tuck her dollies or babies in their bed. Let her know that your door is always open for her if she needs you. As well, let her know that on special nights you will still have slumber parites in mom's room.
It won't happen over night and who cares! She will only be your baby girl once. And I promise you, she will be too big soon enough to event want to sleep with you!! Just start laying the foundation with excitement about her bedroom, fun bedtime routines and by letting her know that big girls sleep by themselves in their own room.
When push comes to shove down the road, put her on a reward system. Example: If she goes to sleep in her rooom for 5 nights in a row, then she gets a reward! Simple rewardslike, a new princess movie or pizza dinner. Note, at 2 she won't exactly get the reward thing yet!
In the mean time, enjoy your precious baby girl! She'll grow up quick!!!