Have that ever happened to you ?

My ex and I broke up with me a few months ago on supposed good terms...She recently called me recently, ..it's been six months I've never heard of her voice .. she emails me now and then but, well ..when she called that day, ...the sound of her voice still have that hypnotizing effect on me, and I can feel my body friling at the sound of her voice and even gets a hard on ...well, I think I still love her ...it seems the chemical in my brain and body reacts to her ...but the relationship with her was not good , and she's actually a "don't even try "path to return to ...I don't want to return with her ...but I felt the feelings for her, each time she's around..I'm trying to hide that to her but, yet I failed sometimes ...!! I'm moving on as hard as I can ...!!I don't know if one day, I will be free and get over her ..!! what do you think ?