Hi Wills, don't worry! This is totally normal behaviour for a growing young baby, and whoever told you that she's treating you like a dummy is both misinformed and causing unnecessary worry. At this stage, the priority is to make sure she is fed and that you are both happy!
Go with it and the extra sucking will stimulate your milk supply, then things will settle down. The more you let her lead, the quicker this will happen. To make things easier, could you feed her in bed at night, and in a sling during the day? A BF counsellor can show you how to do both - (safe) feeding in bed is especially important so you can get some sleep.
I worried about this too when my DD was the same age. Some of the books seem obsessed with the idea of getting your baby to go 3 hours and the result was nothing but pointless anxiety for me and a miserable DD. There's just nothing to be gained in trying to make them wait when they are hungry. If you can respond quickly to demands for feeding, then they settle more quickly, and that in turn helps you feel less anxious.
I think you already know that introducing a bottle is likely to create problems with your milk supply - also bear in mind that the last thing you want now is to be getting up in the middle of the night to make bottles!!
The best of luck, and again please don't worry - what you're going through is a normal stage, which will soon be over.