can you ride too much?
Not in my opinion if you have the the TIME and doesn't cause INJURY and doesn't cause BURNOUT
Ride as much as you can, as often as you can. Try to fit a long ride in there once week. Something 2-3x longer then your normal weekday rides. You should see a difference once that happens.
I used to goal for 8-10hrs per week pedaling time. And hit 11-12hr week at least once a month. A bulk of that would be a 5-6hr saturday ride