Why would she be acting like this?

my ex gf and i were rele good freinds after we broke up, but she says i was stalking her cuz coincendialy i went to the same store she was at then i had to go to arby's to get a call in for my brother and his wife, and she was there also, so since we still talked i sat down with her and her mom till the call in was up, and she says im a stalker and a creeper when b4 we dated we were best freinds for like a year cuz our lake cabins are rele close, and this summer she always walked on my road and i thought she was stalking me, so why would she think im stalkin her if i would be "turnin the tables" when i dont mean to do it to her lol. so i decided if she thinks that about me and a loyal frind to her shes not worth my time, why would she think and call me a stalker, should i not talk to her like i am now and if she wants to talk she can call me, i guess is this considered stalking and if i keep my space u think she will come to her senses and want to be friends again?