<human>: My boyfriend and I live about 100 miles away from each other. We go to different colleges, but we drive out to see each other pretty much every weekend.

We started dating early summer before college, and hung out pretty much every day of summer until I left for school. When we weren't together, we were texting constantly. After I left for college, we still texted constantly. We would also Skype maybe twice a week for about an hour or two.

Recently (maybe past 2/3 weeks), that's changed. We still text throughout the day, but pretty consistently it takes him around an hour to respond to a text. Once, he was dark for almost 5 hours and didn't offer an explanation. The thing is, I know he had his phone on him since he saw the Snapchats that I sent him.

In person, he seems pretty similar. One thing to note is that I've initiated sex a couple times and he's turned me down, saying he was tired. He never used to turn me down.

Should I be worried? I'm worried that he could be losing interest in me, or seeing another girl. How do I deal with this?

Can you give me the gist of the text in a nutshell?
<bot>: BF and I are in a LDR. We used to communicate constantly but it's slowed down considerably in the last few weeks. I don't know if I should worry or not.