I would talk about it with your T more before you consider whether you should talk to your dad (I assume that's who you meant by "Should I talk to him about this?" unless you meant your T). It doesn't sound like your dad is particularly understanding or compassionate, and talking to him could possibly make you feel worse. Basically, you should talk to your T about what you're feeling regarding your dad and what you'd want to accomplish by talking to him.

I've had similar talks with my T and also marriage counselor about whether I should talk to my parents about certain things that hurt/upset me. In some cases, have determined I wouldn't get much out of talking to them, so I should just try to reframe it in my mind. My marriage counselor shared that he went through therapy himself when he was younger and had lots of issues regarding his dad to deal with. He figured out that he needed to feel anger about it and experience that, but actually telling his dad he was angry wasn't going to make anything better. So he mainly dealt with it through therapy.

Hope that all makes sense!