<human>: My long distance boyfriend and I have been together for almost three years. We are both juniors in college and go to school on opposite sides of the country; we see each other for a few weeks every few months.

When we're together, things are great. We are very compatible emotionally and enjoy blabbering to each other about anything and everything. We have sex regularly (most days we see each other, so 4-5 times a week). The intimacy has only gotten better since we started dating.

The first few quarters that we were apart, we talked about sex every day and got naked on camera together a few times a week. This term, my boyfriend has initiated talking about sex or Skype sex twice in more than two months. He's turned me down multiple times each week -- he says he hasn't been thinking about sex much because he's been stressed, which I understand. Earlier in the term, he also was having some doubts about us, which we resolved. In the end, we've talked about sex or had Skype sex less than once a week. I know this is probably normal for a lot of long distance couples, but it's hugely different from the first 1.25 years of our long distance experience and I'm having trouble adjusting.

I know he's been busier this term, and I also know he's started watching porn a few times a week (he stopped for ~1year). We've talked about porn before (it's not something I'm happy with), and he's promised me to use pictures of me instead. I found out that he was still watching, and then he told me it wasn't something he could/wanted to stop. He tells me he uses it for stress relief mainly and that he views intimacy with me and masturbation as very separate. I've accepted this and we don't talk about porn anymore. 

We've talked about the lack of intimacy the last few months. He says he just hasn't been thinking about sex much or wanting sex, and that it isn't me. I'm at a loss. I can't fault him for that, but I also really desire intimacy even when we're apart, and I know it's possible because it was a big part of our long distance relationship until recently.

Can you condense the text into three sentences or less?
<bot>: I'm sad because I want to share some kind of intimacy with my long distance boyfriend while we're apart, but he shows almost no interest these days. Having trouble coping, and curious how typical this is.