I need help. I'm literally about to break.?

I have a friend. Jeremy. He is.. Was. a best friend to me.Until he got a girlfriend. A few weeks back he texted me & told me to call him cause he needed help. So i did. & of course it was for girl advice. I helped him. & now according to Facebook he has a girlfriend. Ever since that phone call he hasnt talked to me since. I texted him a couple of times & he never ever replied. I used to never text him. He would be the one to text me legit everyday. He used to call me beautiful, gorgeous, babe. He would hold my hand & hold me & put his arm around me. & Everything like that. Now he doesnt. My bestfriend knows him too. She texted him. & He texted HER back. But not me? She told him I was upset & sad. Usually if he heard that he would go right to me & text or call me. But All he said was "Tell her i said hi & she'll be happy !" & she told him I said "hi." He was like "Well then o.O" & Then my bestfriend was like "Oh well" & Hes like "Mhm, your right, oh well" As in he doesnt care. I dont understand. Why doesnt he text me? He told me he considered me a bestfriend.. well before he got a girlfriend. He doesnt reply to my texts or anything. Did I do anything wrong? Help :/