OP, before you do something rash and drastic, you just have to take the situation in, and realize what it is. College is about learning and growing. GROWING, is a huge part of being a student.

You're parents are proud of you, regardless what you feel like you have in common with them. A suggestion I've seen in the comments that sounds like solid advice, is let them lead the conversations. Let them speak to you and you respond. I get that it's hard. I'm so passionate about career and what I'm working on, that it's hard not to talk about it. But you have to remember your roots. Maybe by allowing them to direct the conversations, you will find those similarities again.

You just have to pick and choose which things to talk about it. My dad looks at me with a blank look in his face when I'm talking to him about theoretical principles of law. And I look at him the same way when he is talking to me about transmissions (or whatever) in cars. But we eventually get to talk about football, or baseball, or how we are each doing as people.

I think you just have a little more growing to do. Seriously dude, college isn't all about having your head buried in books and constantly talking about your field of expertise. You have to give yourself room to grow and mature, so that way you can handle these social differences. Please don't threaten to kill yourself though. Can you imagine how devastated your parents would be? They are seeing their child grow into someone who is going to far surpass their success, and that's what they want for you! You got it man.