First of all she still likes you. She's probably arguing with you about "dumb" things because you're not really listening to her. But is sounds like your friend is. And soo as she's talking to him to find out about you- they're talking- and she's likeing him because he's actualy listening to her about the whole thing. I dont think she liked him when you guys were going out. ANyway she's now finding that she kinda likes him and that he's interesting and kind. She needs to slow her roll though. Ugh! ANyway- stop the texting. You need to talk with her straight up. Dont raise your voice- wait till she's finished speaking- hear her out- and what ever you say next make sure it's directed to SOLVING her problem that she has with you. NO BLAMING!! Don't even put your problems in the mix because at this point it doesnt even matter with her. IT's either you or your friend. The line is PRETTY thin. Solve her problems first. Then if you get back together solve yours. But if you dont get back together- by you concentrating on her and only her will show that you are a gentleman and a respectful guy of her feelings. Which means you can still be friends.

.. and later something more if her other realtionships dont work out.

But no seducing and no tainting relationships.