Look I get it. Your kind thoughtful dad is now dating me and I can go to hell. You've every right to your feelings. But telling him he "needs to grow up and get a therapist" isn't something you should be doing to the person who's paying for your college. Change is hard, kiddo and you're an adult now, so get used to the fact that you can't control what other people do. While I am a nice person, and maybe someday we'll have a relationship, this isn't about me, If you want to have a relationship with your dad, I'd suggest taking up therapy yourself. Or at least, not telling him he's a piece of shit all the time. Since I won't and can't say this to you in person, since I love your dad, and do want you and I to get along.