<human>: Condense the text into a few key points

Hi there! I moved to a new city at the beginning of the school year, and on my first day the awesome girl from the title invited me over to talk to her. Over the course of the year, we've become very very close, with her friends referring to us as OTP (One True Pair) and "very attached to eachother". 

Anyway, her ex-boyfriend of less than a year has recently been very very jealous going as far as telling her not to talk to me because we spend a lot of time together, and getting his friends to try to ask me if I liked her and if I understood that she had a boyfriend. My current status with her is being very attracted to her. 

Obviously, I respected the fact that they were dating and didn't try to make any advances, but sometimes she puts her arms on my leg or on my shoulder, or touches legs and just leaves it there. Neither of us acknowledge it or any of the other flirting we do (I contained myself to just minor teasing whilst they were dating).

 But now, I feel really really bad for not telling her to stop putting her legs on me/her arm on my shoulder etc. Her ex didn't trust me to respect him dating her (I did) and would always chew her out. I tried my best to keep my mouth shut while she was contemplating breaking up with him, but I ended up saying that she should break up with him since they have trouble trusting eachother. 

Am I at fault here? If you need me to clarify, just ask please. I really need help and I'm just rambling right now because I can't think straight. Also, a side-note I'm incredibly scared to tell my other friend who is also the ex's friend that I feel at fault because she might tell him and things could get ugly.
<bot>: I feel terrible for not telling a girl in a relationship to stop flirting with me, and feel resposible for their breakup.