My ex left me because of my mental health six months ago, we were together only for five months, but I'm still struggling. I see him everyday and we talk because he sees me as a friend, but it's very difficult for me to deal with my feelings when he tells me about girls he likes and other things. Should I stop taking to him? Or should I tell him the truth? 
And why am I still so attached? what can I do to stop it? it's unbearable and people don't understand it because he treated me like shit.
Any advice?