I cannot even come close to cover what the other posters have so I won't try but each person deals with bereavement/heartache/life in their own manner.

For me I accepted each feeling, didn't try to fight them but didn't let them consume me either.

I like the phrase
It might not be easy but often finding somebody who is half decent just to have a date with or bump uglies (but avoid a full-blown relationship) will really help. For some it is re-assurance, others comfort and many just a distraction.

Good luck!