I also kept my abuse a secret from everyone for a very long time (42 yrs.) You are off to a good start by wanting to face it this time and have told others here about it.
Your feelings will be various such as fear, shame, embarasment, etc. and are very common among survivors of CSA.
If you haven't already, you should get a therapist well versed in treating male CSA survivors. It will be a hard road with lots of detours, but remember a detour eventually brings you back to the main road, even if it's not as fast as the direct route.
Good luck as you continue to heal.
I will mourn the teenager I never was and strive to make that dot of light way out in the far reaches of the end of the tunnel turn into a bright sun.
WE ARE NOT VICTIMS. WE ARE THE SURVIVORS!!!