Would I ever love a girl again as much as I loved her?I have totally lost the hope in it and feel devastated?

It happened 6 months ago and I still cant figure out a way to get over her.I am 23,working and everything is fine professionally but just because of this thing I am missing out on a lot of other things and I really don't want to be this way.It is the first thing that comes to my mind when I wake up everyday and stays with me through out.I tried her calling to know what exactly is the reason and she never picks up the phone.All I am left with is a broken heart for being so nice to her and I cant even hate her after all these.My friends tried their very best to help me move on but I have let them down too.Every time my phone beeps I wish it was her.There are lot of things that keep reminding me of her and I get easily upset over it and the things we spoke are still fresh in my head as if they happened just yesterday.Kindly suggest on how can I change myself so that I can be normal as earlier?