This is no fun no fun no fun at all please help somebody!?

ok my ex broke up with me a little over two weeks ago before we went out we we're best friends while we went out we were even closer and now were just back to being best friends.......simple right well heres where it gets a bit tricky.... alright so she called me the day after we broke up twice which seemed weird to me..... I tried at school the whole not sitting at lunch with her deal....I failed.....tried moving on.....failed.....some how I just can't move on.... she's my best friend and what not....and trust me she throws that term out alot as well with the whole "Best Friend" deal. I seem not to say anything back because I still do like her but am afriad that if I was to say something I'd screw up what I've fixed over the past couple of weeks. However she still gives me hugs, wants me around her, calls and texts me, and has even talk about when we dated which is kind of akward because I am the type of guy that is kind of shy and what not and doesnt express my feelings and emotions as much as I should. My other problem is prom is comming up in April and I want to ask her but am afraid I'll screw up I just feel confused she's my best friend yet she doesnt act like anything has changed its like we're going out still but not holding hands and ect. if you know what I mean....My ex also has this other friend who I know for a fact is a "sleezebag" that my ex is now started to really talk to. As a guy I despise my ex/best friend/crush/ whatever's newly found friend for the soul reason that she might be telling my ex to just screw with my mind to make me hurt more....I just need some good advice I'm doing all I can my ex/best friend/crush/whatever is a very very clean girl aswell so you can see why im worried as well many guys in her past dont treat her right I WAS ONE THAT DID TREAT HER RIGHT I still care for her alot as well I just feel drained like I said some good advice would be nice I'll give points for the best awnser. Please! This is no fun to go throw!

Thanks!