There are websites that deal with this directly, go to http://www.americantowns.com/fl and check around but also google orlando roommates or roommates orlando and see if anything pops up.
Good luck and be careful,
If you donâ€™t have a Realtor helping you take time to explore my profile located here on Trulia: http://www.trulia.com/voices/profile/Real_Estate_Pro-Orlando
And my website below,
Dave Lowe, Broker Two4One of Orlando
GRI â€“ ePRO â€“ GREEN (Designations)
Innovative / Save Money / Great People