The fact that you are able to play flute is a evidence that anyone-even the ones having a tear drop lip can play a flute. The technique might be different but practice can make anyone perfect. There are various websites that provide details on the right techniques for using a flute for normal players and for people who have a tear drop lip. See the following links:
www.nemusicpub.com
www.public.asu.edu
www.nemusicpub.com
www.public.asu.edu