Advice

I've been with my boyfriend for 7 months now, and I feel like he's getting bored with me. I'm a full time college student and he works 40 hours a week. He used to come over at least three times a week, but lately I'm lucky if it's more than one. As of today I haven't seen him in four days, that's a long time for us. We text a little, but he's really bad at replying in a timely manner, which bothers me a little, but I get it, not everyone checks there phone regularly. I don't know what to do, or if I'm just being overly paranoid. Help?