Hello Cindy
I am typically a huge proponent of the W&W brigade (I am 39 years old, small tumor all in the IAC [ear canal, far away from the brain], decent hearing, active, young children, no balance issues etc.). I think with small asymptomatic tumors W&W is perfect - I have research which sindicates over 65% of small tumors don't grow in 10+ years. So, W&W has tremendous advantages if you meet the criteria... but also risk of hearing loss and obviously continuous, yearly to every two year monitoring, so not a free ride! (and, heck the sucker may grow!!!)
However, your tumor isn't exactly small, isn't 'far' away from the brain stem (all relative I guess, it is just a couple of cm) and is causing you weakness/numbness in your face. While no one really knows, my unprofessional guess is you are unlikely to make 10 years (or more) before the tumor will need to be managed.
You do have time. If your doctors suggest a 6 month MRI - take the time to do your research and get comfortable with the risks, and then move forward at an appropriate time for you. This forum has a great variety of experiences and backgrounds to help guide you in your decision.
Good luck.
Ann