Am I overreacting?

So I 19(m) started dating this girl19(f) last year. The relationship has been alright but it's never been great.... we've never fought or anything and we have some nice moments sometimes.....but then here's the problem she doesn't talk to me about anything....she has moments of telling me what's going on in her life but then other than that she doesn't really talk to me....she doesn't initiate any conversation, she doesn't try to get intimate, she doesn't even try to know what I've been up to unless I tell her...and I actually tell her everything....I doubt I have any secrets left for myself....she basically knows me in and out but then it's not that she hides things from me either....it's that unless I don't start any conversation then we basically won't say anything to each other the whole day...I know she loves and I'm actually her first boyfriend, I know she isnt cheating or anything coz we even use each other's phones but i don't know what to do. I love her I really do and I'm actually willing to continue dating her and going as far as probably marrying her but things feel stale. I've run out of things to say and I've been starting conversations for a whole year now...and to top things off we literally have no common interests, we have completely different backgrounds....I'm someone who grew up on books,novels,TV shows,anime,the internet, video games and so on ,so I'm well versed in a lot but then she basically grew up without internet and isn't really interested in trying any show I ask to watch. There's not really much connecting us expect for the feelings we had for each other in highschool and the fact that we were both each other's firsts in nearly every regard but now we've reached a point where we don't have anything to talk about, our phonecalls are dry ..our texts are drier. She probably sees nothing wrong but for me it's killing me inside but I don't really wanna leave her or anything. I've tried talking to her but she's not seeing my point... which now brings me here...what do you think I should do