Hm the "avoiding" bit has me intrigued, because at times I've felt like this was true (which is why I've been so confused when looking back on all our encounters as a whole). For example: Late in the spring semester, we had gotten into a routine of having lunch together about twice a week (after class). He's the one who initiated it and began walking with me somewhere to eat then eating together, instead of riding his bike back to his room like he usually did. However all of sudden for a week or two he just stopped and started riding his bike back to his room like normal. At this point I wasn't romantically interested in him yet, but it still really confused me. I figured that maybe he just didn't like me anymore or was busy. But it was still strange -- the avoidance. After about two weeks he started having lunch with me again, invited me to a lecture/discussion with him (he's into political science), and everything was "normal" again.
Currently, he's still kind of hard to interpret (like I hinted at in the opening post). He'll seem very interested in spending time with me and happy/attentive/talkative when he's actually around me, one day. Then the next week, he'll fail to text or call me at all
*. He did finally message me after a week and said that he's been busy (then he asked how I was/what I was up to, etc.), and I completely believe him (because he's mentioned his schedule before and he said we could do something again next weekend), but still...it makes me wonder if he's actually interested in me at all or maybe if he's "on the fence".
*Although I should probably note, in his defense, that he seems to be horrible with contacting people via text/phone. Shortly after he had texted me back, he updated his Facebook status to say "[his name] needs to learn how to call people" And about 5 of his friends (both male and female) replied: "Just pick up the phone, it's not that hard", "You need to learn how to text people too", etc.
INFJs can be very confusing

- subtle signals, attentiveness, avoidance, attentiveness again, etc.
I'm glad I have you all to help me though!
New Question: Are INFJs very indecisive/fickle when it comes to deciding on who they like? Or do they pretty much "know" and stick with that (barring any major complications/events/etc that would change their mind)?
For me (ISTJ): I may be indecisive (weighing all options and leaning towards a different option each day)
leading up to a decision, but once I actually
make a decision I'm committed to it fully. It may have taken me 5 months or so to reach the conclusion that I am actually interested in him (romantically) but now that I've come to that conclusion, I definitely will not be debating it anymore in my mind.

Now I've moved on to the next step/decision: Determining if he's also interested in
me and taking any necessary steps.