No one said it would be so hard....what is my boyfriend thinking...?

That's a tough one, maybe you both should find some time to sit down and really look at where you're both headed and try and talk about the issues you think are starting to pop up. You won't be able to fix it unless you confront each other on it, guys sometimes don't realize somethings wrong until it smacks them in the face (I know all about that, I'm a guy lol). Maybe you're reading too much into this and he's just busy. My suggestion is sit down and talk about it, once you get a good idea on what he thinks, go from there.