Some people just end up becoming friends, me and my ex loved each other but after 4 years it became more like a friendship rather than a relationship. You can get stuck in a rut, unfortunately we were fairly young, and it took me drunkedly cheating on him to realise that we werent in a relationship anymore.
I have been with my current boyfriend for two years and we still fancy each other from the first day we met and I cant ever imagine that changing. So sometimes I think things just dont work out.
It is tough, but you do get over it, he moved out and I suddenly had to pay all the bills on just my wage (which wasnt much) I spent hours crying, but I dont necessarily think it was because I missed him, it was because I missed having someone there.
It gets better after a while and like someone else said you will be far happier!!!