I've heard it can take as long to grieve a relationship breakup as the time you were actually in the relationship. If its taking longer could you be grieving for what might have been rather than what was? Keeping yourself busy and meeting other people might lessen her hold on your thoughts. Good luck.

I'm sorry your friends don't seem to care. It's probably because most people think hurting over a breakup is silly or none of their business.
Most relationships I've been in, if you can even call them that, were strange. I got hurt many times when I should have never dated these men in the first place because they were losers and nutbags. That's what I grieve over. Losing my strength and independence. Don't let this ex have power over you. Stop replaying the conversations in your head.
They say the best way to get over a man is to get under another one. I suppose that works on getting over women too?
Put your time and energy into something healthy and productive, then start dating again. Try to have fun and meet lots of women.

We all grieve the loss of a relationship. You are not stupid because you still love her. I too am grieving the loss of a relationship. I also came to realize that part of my grief was not just the loss of the relationship but the loss of what I imagined could have been. I continue to care very deeply for the woman I was involved with and some days think about her a lot. Just the other day I thought about contacting her but decided against it because what would it change. I am learning to deal with my issues as well as I am learning to love myself because without love for myself I can't properly or truly love others.

There will come a time when you can accept it.
When that happens, you will be okay with her not being in your life, as much as when she was in your life.
So, remember, that your goal is to come to that point of acceptance.