Sorry to digress back to the original question...
I'd hope that's true... cause that's happened TONS of times. During that month of awkward tension when we barely talked, that seemed to be the case. I would show up and he would acknowledge my presence but then doesn't talk to me for the rest of the night or even sometimes take actions that could be taken as "avoidance" (like not being in the same room). That's the "cold" times of the hot and cold. Right now things are more on the "cold" side, and like I said earlier, he acknowledges my presence but doesn't really talk much. Our eyes meet frequently though..followed by quick turn of heads :-(
I hope our ISTP friends will correct me if this is bad advice, but...
It really doesn't seem like you want to move on. It sounds like this is the guy you're interested in, and you're unlikely to get over him any time soon. In fact, for the foreseeable future, it sounds like every day that goes by without him as something more than a friend, there's something missing from your life. Is that basically right?
If it is, I think you need to at least know you've done whatever you can to further the relationship. Several ISTPs have mentioned that they were involved in what most people would consider relationships -- in some cases even leading to co-habitation or engagement -- without actually applying the word
relationship or using words like
girlfriend. Maybe there's a chance you can resume the physical relationship, call each other friends, and in the meantime, get to know each other better and deepen the friendship.
There's a chance that he's just in it for the sex, and you'll get hurt later. But it sounds like you're hurting right now anyway. There also might be a chance that he has deeper feelings but isn't ready to commit to anything right now, or just doesn't want to apply terms like
relationship to it. There's a chance that as you get to know each other better outside of bed, it will become clear to him that he wants you to be part of his life.
If I'm reading your feelings correctly, I don't see what you have to lose by going for it, as long as you're willing to be patient with him, and recognize that even if it works out (which it definitely might not), he may not want to be labeled your boyfriend or do traditional couple-y things for a while.