Two months is not exceptional. It could even take more than two years before a site is reviewed. It all depends on the category, the amount of suggestions received in that category, the quality of the sites suggested (some categories attract a lot of spam) and ofcourse it depends on the volunteer editors (noone knows when they will do any work and where they will do their work).
There is also never a reason to suggest a site again (unless explicitly asked to do so by an editor).
After a site is suggested several things can happen.
1) the site is waiting review, no need to suggest again the site won't disappear
2) the site is listed, no need to suggest again
3) the site is rejected, no need to suggest it again if we don't want to list a site suggesting it again won't change our opinion