What to do what to do...?

k..well this has to do with 2 girls...the first one her name is annie..she was in my cles in school and ever since i saw her and got to know her ive liked her so much but i wasnt sure if she liked me or not..then her phone battery got messed up and she had to get a new one so i couldnt text her for a while but when she got the new battery and we started texting again and we became like best friends and i could tell that she liked me because she was flirting with me...now heres where the second girl comes in and her name is carolyn..well carolyn was on vacation and when she got back some time in march (before annie got her phone fixed and started flirting) she started liking me but i wasnt sure if i liked her because i barely knew her but she lives close by my house and i see her a lot and she did look good but annie looked better and ive been liking annie for a long time but i ended up going out with carolyn in april 10th and annie was still flirting but she started liking another guy so it was just me and carolyn..i fell in love with carolyn but then u started to see her true self and the way she acted and theres some stuff i dont like about her but now annie likes me and she keeps telling me to break up with carolyn but she is in love with me and if i do that it would break her heart and she would be devestated but im starting to like annie a lot and i told her how i felt about her and she keeps saying that i should just break up with carolyn but i dont know what i should do...annie is like my best girl friend i talk to her about carolyn and there are some things that carolyn has done that was stupid and when i told annie then annie told me that she shouldnt be doing things like this to you soo idk...its a hard decision..should I stay with carolyn? or break up with her and go with annie? HELP ME PLZ!! THANK YOU