If you absolutely must give her a bottle, then the best way for her to take is without you around - not even in the house! Hand her over to someone else (hubby) and you leave the house (go for a drive/walk/shopping/etc.) and then he can offer her the bottle.
The reasoning is why would baby want a bottle, when the best thing around is so handy! :)
That said, you should be able to go for a massage without worrying too much about nursing - she should be able to go 2 hours between nursings. And for that matter, a lot can be done in two hours! I find that when I'm home, my baby will eat pretty often (hey, 24/7 buffet, just turn your head!) but if I'm out and about, she does just fine.
The important things to realize are 1) if you are skipping a feeding and not pumping during that feeding time, then your supply will decrease; 2) your baby loves you and wants to be with you - you are her world, her sole source of food/comfort and it is a built in response to be concerned if you aren't around. 3) I'm sure you've heard it before...but truly - this time is so so short, and you *will* have plenty of (the very important!) me-time. My third child is now 9 months, she's never had a bottle (babies 1 and 2 did) and yet I can be still be gone for hours if I need to (and believe me, there are times I *need* to!).
This strange piece of plastic just isn't momma. It will take some getting used to, but she probably won't take the bottle from you, it'll have to be someone else. Or you can always try the sippy cup - I've heard tons of success stories even with very young babies!