Need help,baby using my breasts as a pacifier!!

So by I breastfeed my 8 month old baby girl. And for the past 2 weeks she has been using my breasts as a pacifier. She wants to keep it in her mouth and the moment I put her down for the night in her crib, she starts crying because she wants to keep my nipple in her mouth. She doesn't take the pacifier either. So the other night, I let her cry it out but she cried for 20 minutes with no chance of calming down.. so I took her out. I need advice on this please!!! I really don't like the cry it out method and I know by boobs are her comfort.