Search Results: passive or aggressive guy

How do you express your jealousy?
This guy who isn't even in a relationship with me gets jealous from all of the following things and reacts by either getting mad at me or acting passive aggressive and distancing himself from me... I was curious as to how many of the following things make you jealous:
1.) When your girl/girl you like has a guy friend she talks to a lot- but who she has told you multiple times is just a friend.
2.) When a mutual guy friend hugs your girl/girl you like.
3.) When another guy flirts with your girl/girl you like.
4.) When your girl/girl you like jokes about how cute another guy looks.

I became friends with another summer intern last year (someone, as it turns out, goes to the same out of town school as me). He would invite me to lunch, we went for drinks, had heart to hearts, he flirted, encouraged me to pursue photography because he thought I was good at it, called me cute, said he'd checked out my ass, always texted to make sure I got home okay, sent me links to things he thought I would find funny, and said we should hang out when we got back to school. We had plans to do things, they never happened. He got in touch once a month, maybe, during the year. I forgot about him, dated people. We got back for the summer and he acted buddy-buddy again. He flirted a little bit, but he doesn't invite me out anymore; he suggested we see a movie and get drinks, but neither happened. I confronted him about what happened to our so-called friendship, and he explained that he had been too busy during the school year; he said he'd try to do more - but really nothing has happened. He tries to be in touch some days at work, but that's it. I bumped into him today and I was nervous, and shaking, and my heart was beating like crazy - I don't know what the physical reaction suggests.

After this run in I told him I was sorry for sending a passive-aggressive text, and that I figured stuff out and was sorry for acting like a jerk. And basically just said "Peace". He said "I found a vanilla coke, be jealous." I'm not sure if I should try and explain something to him AGAIN. I'm not sure if I should explain I had (have?) feelings. Or even that at the beginning of the summer I was DTF.

What should I do?