All babies are different.

J is 16weeks and has been rolling front to back for a while. He has yet to go from back to front.

My daughter was very similar to yours in some ways.  She always HATED tummy time and she was a bit over 5 months before she managed to roll.  At first she could only roll from her back to her tummy (and not on to her back again).  Because she hated being on her tummy she would just start crying - this got rather frustrating as I was having to flip her over again 20 times a day.  Eventually at just over 6 months she finally got the hang of rolling on to her back again and she hasn't stopped.  She is now 7 months old and rolling faster and faster.  I'm amazed at how much ground she can cover in a very short space of time.  We've had to baby proof as much as possible at ground level and I can no longer duck out of the room for a second and expect to find her in the same spot when I come back (or in the same spot in the cot when I put her down to sleep) .  All babies are different and will develop at their own pace.  There are some things my bub's done early and some which have taken her longer than other bubs. 

Ahhhh...I loved reading all these answers!!!  Aren't babies wonderful?  Brings back all the worries and concerns and then you find that all is right and your baby is just fine when ever and how ever they do their thing!!!  I see it now in my son and dil and their baby.  The concern is always there and aren't the kiddies so lucky we take such good care of them??  The best to all you wonderful Mommies!!!

Leena started rolling over when she was 5 months, and i was worried too, but thay have told me to give her a time she will but when she feels that she's ready, now Leena is 8 months and she didn't start crawling yet am worried again but they told me the same nothing to be worried about so take it easy honey  ...

my bubby boy had a bit of reflux up until 12 weeks so i didnt do tummy time unless he was lying on me or something just as soft lol.

at 12 weeks i started doing tummy time and he hated it so much that he flipped himself over and rolled everytime i did it after the first go lol my daughter was about 10 weeks but she had alot of tummy time from birth.

hmm my son is 16 weeks and he doesn't roll yet either, nor does he enjoy tummy time but he was a premmy. Thanks for asking your question because I'm browsing through the answers too.

My son started rolling over somewhere between 3-4mths.  We did things like get the fit ball out, put him on his tummy and roll him around, he loved it.  we put toys in front of him so he could touch them.    I also layed on the couch with him, with our tummys together so he was on his tummy on mine.   Why not get a mirror and put it in front of her. 

Remember all kids are different as you would know haveing to boys already...  don't stress and persistance is the key.  It will happen in time. 

Amber started rolling from front to back at bout 3 months (which stoped tummy time for a while...) then by 3 1/2 months it was both ways .She always rolles onto her tummy every time i put her on her back then she forgets she can roll back and crys.... even when i help her roll to her back she rolls back on her tummy and crys! I do think shes a bit silly some times lol.

Jake was around 3 months old when he rolled over one way by 4 months he was rolling both ways, but my girls were rolling over at more like 5 months.

xoxo

my daughter started rolling over when she was about 5 weeks (by accident) and by about 4 or 5 months she was doing it on purpose.

then within a month  and a half she was sitting up, standing, and creeping around furniture (it was nuts! i was so not ready for it)

I'm sure your daughter will figure it out soon, but for now she's probably just enjoying the view she already has.

do you have one of those floor blankes with the mirrors and chew toys and such attached to it? maybe if she had something to look at that was comfy to lay on she would start to enjoy tummy time.