Hi and welcome to the site I'm sorry you're going through such a rough time. I've never been in that situation but I know it must feel terrible. I'm pretty much in love with someone that I know I can never be with so I can relate to your situation a bit perhaps. I'd never loved anyone this way before. It hurts...very much. I wish I could offer you some real support but the best I can say is that I've read that a break-up is a little like the death of a loved one. You go through stages of grief that are painful and seem to last far too long. If you make a post in relationships you may be able to get some support and good advice from someone who has been through this.
coping with emotions forum
Relationships & Communication forum
Good luck and take care