<human>: So reddit, i have a small problem, but first let me provde some back story.

BACKSTORY: My friend who we will refer to as C,  broke up with his gf of 3 years,who we will refer to as J, about  2 months ago. During their relationship, we were all very good friends with each other and always hung out. I was just as good as a friend with J as I was with C, so when they had finally broken up, I didn't take sides and had helped both of them through it. Like any good friend should. Well a couple months have passed, and with college about to start for all of us, C is starting a new relationship with another girl, but J and myself, are still very much single.

PROBLEM: J has been starting to text/ talk to me a lot more then she used to, she is even wanting me to go to college orientation/tour with her and what not. As I said above, I am friends with both, but what I am seeing now is that she is starting to take more of an interest in me, and the same goes for me about her. Basically I am torn because I'm not sure if I should hangout with J or talk to her so I don't upset C, but J is a very good friend of mine also and we will be taking similar courses in college and I really don't want to ruin that friendship.

Could you distill the essence of the text into 1-3 sentences?
<bot>: friends ex is taking interest in me, and me in her. But I was friends with both during their relationship, and not sure what to do. (friend also found new gf)