Help me ?

Carol
My boyfriend is pushing me away his  depression is at it's worst I've never seen him like this .He never wants me to come over , he doesn't call or text me and when I blow up his phone he doesn't answer for hours or days ...  I don't know what to do ??  .. He gets really bad bad anxiety attacks and he just doesn't want me around him ..
​I don't want to loose my bf I love him so much ?  
​wtf I'm broken into pieces because I can't help him ?