Are my (19F) expectations too high? Is this my fault?
This is my first relationship, so I don't have any way of knowing if I'm being idealistic, but I feel really pushed aside by my boyfriend (19M). I've talked to him about it, how he never talks to me through text anymore save for one or two messages a day to check on each other, anytime I try to talk to him he cuts me off asking me to let him have his alone time and to speak to him in person. Then, in person, the day starts out until he starts to act very apathetic about an hour after, being cold, dry and generally returning any words of affection with a tone that reads like saying "I love you" back is a chore. He didn't invite me to his birthday, saying it would be awkward to have me and our mutual friends together, he doesn't flirt with me anymore, and just told me he won't work with me on the only project we have ever had together since we started college, because he wants to talk to new people.
I have, of course, talked to him about it, he says we spend too much time together and would like more time to himself and other people. We spend three of four days a week together, two of which we have 8 hours of class, and at most 3 total hours to actually spend time. All four of those days he's treating me cold and dry and unloving, because, in his words, he's sick of how much attention he has to pay me. He has friends, but doesn't do anything to try spending time with them either. He also has gotten the habit of turning bickering into mocking, calling me sensitive when I get too upset for his liking.
Maybe I'm exaggerating, and I have a weird ideal version of a relationship and couples don't actually spend as much time together as I grew up thinking they did, and he is genuinely burnt out. But again, I have no way of knowing, I just want the sweet man who used to send me overly sweet stuff and let me sleep on his shoulder back, I don't know what to do.
Tl;dr: My boyfriend doesn't want to spend as much time with me lately, he doesn't like talking through text and is cold and dry with me on days we do see each other. We spend at most 4 days a week together, with two of those days only having a total of 3 hours worth of actual interaction, and when we interact he speaks drily and acts cold. I'm scared I have actually been too insistent by expecting us to spend more time together, I don't know what to do. Yes, I've tried talking to him multiple times.