Is it normal that i think my ex gf's close friend likes me

so i just recently broke up with my girlfriend who i dated for a year and a half because things changed and i didnt love her like i used to. I've known one of my ex's friends for about 4 years and we were always close. we would talk about anything, text each other a lot, always laugh at each others jokes, and everytime we see each other always have the longest hugs. she just got home from school which is like 3 hours away from where i live. since then we have been spending a lot of time together and seeing each other almost every day. We got drunk together last week and i let her borrow my sweater and when she gave it back, it was washed but i could tell she sprayed her perfume on the chest area purposely as weird as that sounds. her and my ex are pretty good friends but they have never talked even close to as much as me and her do. she always use to ask me how me and my gf were doing while we were dating. now that were not im not sure if shes giving me hints that she likes me or she just thinks of us as friends. i told her her perfume on my sweater smelt like shit jokingly. and she told me that it smelt like sex lol. and then she tells me it makes her want to have sex and that she always wants to have sex. i responded as if it was a joke but something tells me that she really does like me. im just wondering if all this is normal and if she actually does like me. any opinions that anyone has would help thx..