Why am I turning lez for the one women I used to hate?

this girl and I fought over the same guy for a couple years. WE said horrid things to eachtoher. She called me fat and ugly and I made fun of her for getting d by her dad..I know. HORRIBLE. Well suddenly he is out of the picture and she and I have been kissing and touching and spending every day together like we are falling in love. And we've both been straight our whole lives! Im 33 and she's 39.