[sick of it]

for those of you who have been destroyed by a break up...where it takes months to get past it, did you date durting that time? did you want to be with anyone else? could you even imagine being intimate, trusting, being in a new relationship?
ive read posts where some people take 6-18 months to "get over" their ex depending on how emotionally involved they were. im currently 7 months into it and havent wanted anyone else but my ex. thinking of being with anyone else makes me uncomfortable and almost feeling sick. you can imagine how i feel thinking of the ex and her new guy. is this normal...?