Does this "nice guy" coworker like me? If so, how much?

I would like to avoid awkwardness, but it is somehow difficult for me to read the signs.

We know each other for almost 1 year.
He is generally very sweet, whatever he does could therefore mean that he is just being nice.
A while ago I felt that he had a major crush on me, then I thought he started to like someone else. I stopped sending any signals and we are sort of friends now.

A few weeks ago I noticed several things from his side that make me wonder :
- He is permanently asking work advice from me (well, I have some expertize), so he is at my desk > 5-6 times a day
- Every now and then a brush/touch happens between us (hands, feet, ca. once a day, he is usually someone who maintains a good distance), could also be a natural consequence of us talking more often
- He initiates hugs/fist-bumps. The last hug was particularly awkward, he didn't let me go when I pulled away, until I got back in and clapped him at the shoulder. Again, is he just getting more comfortable?
- He started to text me outside of work (but always on work related issues) or talking about him thinking about texting me the night before when he couldn't sleep. He has my number for half a year now and this never happened, if anything the texts were really one-worded and without smileys. Now we're having real conversations.
- He started to sometimes turn his head when I pass buy and quickly turn away when I look/smile at him.
- In groups he behaves in either of these two ways: 1) completely ignoring me and turning away or giving one-word answers (since we talk a lot alone and clearly like each other, this is very weird for me) 2) commenting on anything I say to anyone, especially using our insiders or mentioning stuff that I told him months ago - again could be here that this behavior is really addressed at someone else than me?
- Behaving nervously around me (could also be impatient), like playing with a pen, adjusting his hair/clothes, dressing/undressing his jumper

Help me - is he just nice?
Updates
+1 y
There was some escalation of touch from his side when we were at a meeting sitting next to each other. He was constantly brushing his arm against mine (not letting it there, though). I suppose this was either of two things: 1) On purpose (because this never ever occured so far, even if we had to sit extremely close together) 2) He is not conscious about touching me anymore, because he thinks we are just friends. However, recently I touched him unintentionally and he flexed quickly away...
Does this "nice guy" coworker like me? If so, how much?
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