I agree with Candu, help him know he is safe, wanted and accepted by you. You are NOT his therapist, so help him find a great male sexual abuse therapist and then let him decide when going to him/her is best, it may not the right time for him.
You are a supporter, which is limited to listening to him, having a sympathy, but not rescuing him by allowing bad behavior or abuse from him to you. Personal boundaries are paramount, as well as a support group for yourself in CODA(Co Dependents Anonymous). You need support. DO not take what he is frustrated about in the abuse personally. You are innocent, a wonderful human being, a beautiful, caring person. Always remember.
You and he can form a strong relationship through the fires of the abuse recovery, but there will be hardships. Make a plan that gets you from his potentially strong release of emotions or isolation to a healthy place for you and accepting this behavior as he heals. Consistent, long term support may be necessary.
A supporter is greatly valued here, Querida. Thank you for helping a fellow survivor. Please let us know how we can support you, and encourage him to find us and share his story do that he too may heal.
MaleSurvivor Moderator Emeritus 2012 - 2014