Sexual Abuse Support Group
Sexual abuse is a relative cultural term used to describe sexual relations and behavior between two or more parties which are considered criminally and/or morally offensive. Different types of sexual abuse involve: Non-consensual, forced physical sexual behavior such as rape, incest or sexual assault, or psychological forms of abuse, such as verbal sexual behavior or...
As for your boyfriend, I wouldn't say anything to him. If he was abused by his brother this is something he has to heal when he is ready. It can't be forced on someone. I am sorry your relationship ended with him as it sounds lime you had found someone you could trust.
Take care
I think you should hold on to the good memories and know that you are worthy of a good relationship and a good future, but with someone else.