Relationship Advice

Lately, my boyfriend doesn't seem to care about me at all. He hasn't been wanting to discuss arguments unless they were over text, and they are never resolved through text. When we have a chance to talk over the phone or in person, he has absolutely nothing to say. It frustrates me because it makes me feel I'm the only one that actually cares. He's been in college for a few months now, and I'm finishing my senior year of highschool, and we've been together for almost 15 months now. I've tried everything to fix our problems lately, and I just don't know what to do anymore. Does anyone have any advice at all on what to do? I love him to death