My ex was sexually abused by her uncles for many years. I was the first person she told me. It took her another 5 years to tell her parents.
I think it is important to tell. I know most victims do not want to admit it. But I have to agreed with Leed on one thing, rarely is there an abuser who abuses only one person.
Once my ex came out with her story, it was discovered that her uncles had also abused her sister, tried to abuse her brother and mother. And who knows who else they might have abused in the last 20-30 years.
Also, if I am in a serious relationship, I do not want any secrets. Secrets always come out. Always. And it is better that our secrets come out from us...when we can control how it comes out, than having it come out from someone else or incidentally when we are not prepared to deal with it.
Also, what I saw from my ex was that her sexual abuse affected our sexual relationship. Too many times, way too many times...when she was mad at me or something she would say all I wanted to do was get in her pants. Deep down she had issues with physical intimacy. And it wouldn't come out while we were intimate but much afterwards.
Lastly and most importantly, I am so sorry to hear what you have been through. This topic kills me to my core. It enrages me and boils my blood how men can do this to children. Especially men who are related to those children. I wish the very best and mental peace and happiness.

Will he be irate towards your parents? Yes. I hate her uncles. Yes if he loves you he will want to protect you. My ex was also physically, emotionally, and verbally abused by her parents for years...still is. Except...she broke up with me to stay with them because they do not approve of me. My question to you is, why would you want to defend your father who has done this to you? Sorry for my question...but to me family isn't blood....family is someone who will love us for who we are and be at our side through anything.
Good luck and all the best!