<human>: I wanted to get an outside opinion on what's goin' on here. 
So I have feelings for a friend of mine who's taking his masters abroad this year. We dated for a while in high school, and I ended it, being too emotionally immature and not ready for a relationship. It's been several years since then, and we are good friends now. 

This past summer we were spending lots of time together, texting when we were apart. It felt like we were dating even though we weren't. There were a number of hints dropped now that I look back, showing that he was probably interested, but I failed to pick up on them.
So I didn't express my feelings for him before he left, and now things are different.

As the months went on, he would take longer to respond in between emails, and sometimes not respond at all. I often would initiate emails and suggest skyping, and even sent him a cool package in the mail. Lack of contact with him sucks, and I miss him loads.

I wanted to ask you guys what you think is up? I came to a few conclusions myself:

1) He's interested in someone else/ dating someone in his current locale

2) He's not interested in me

3) He's super busy with his Masters work and stuff over there that it's tough to keep in touch

4) He might be interested in dating in the future, but long-distance sucks, so he's trying to focus on what he's doing and where he is, rather than try to keep in touch frequently.

I dunno guys. My heart hurts, and I still like him. I'm trying not to assume anything or be too clingy because we're not dating - we're just good friends at the moment. It would be nice to get some advice though!

Give me the gist of the text in a nutshell
<bot>: I like my friend who's studying abroad, and I thought he felt the same way before he left. Now it seems to be a one-sided effort to keep in touch. What do you think is going on?