So I have this guy friend? (this is a bit long, but I'm really desperate for answers please) :(

So first off, I'm bi, and I have this friend who is male like me and for a long
time he's been acting very strange when around me. He doesn't know I'm bi (I don't know if he has assumed I am) I've been supecting that he
might have feelings for me but I'm not sure if this is just how he acts or if he
actually does have feelings. Things he has done include...

-He's only had
one girlfriend who he broke up with years ago and she turned out
Bisexual.

-When my female friend offered him food he declined, 2 seconds
later when I offered, he accepted.

-Some of my guy friends hugged him and
he was like 'What the hell?' but afterschool that day when we were alone he said
to me 'well.. I gotta go now, so... bye...' and hugged me from behind while I
was sitting down IN FRONT OF MY FEMALE TEACHER. (He doesn't hug other guys, and
I've never seen him hug another guy except me)

-His friends told me that
he would talk about me all the time in their classes and they got annoyed
because he wouldn't talk about anything else.

-He constantly stares at me
and once I caught him staring at me and he quickly looked away. The other time I
caught him and he smiled to me and nodded his head.

-I've offered him the
rest of half eaten food and he didn't have a problem accepting it.

-We've
locked eyes and we both looked away, but ended up locking eyes again only to
look away, but than we locked eyes again and this repeated about 4-5
times.

-When we're in a group of people, he is always staring at me or
his attention is to me even when the conversation is focused on another
person.

-We were sitting in a group one day and one of my female friends
hugged me and he looked at me like this >.> and he then he turned away and
it looked like he was upset because he made a face that looked like he was
annoyed and upset about it. (I assume it was about the hug because there wasn’t
anything else happening when he was looking at me and made that
face.)

-If you believe in the body language stuff, His body always faces
towards me in a group. and he usually tries to sit or stand near me.

-He
gets defensive if someone calls him 'gay' and will be like 'what?!?!
no??!?!'

- when I would see him in the morning and hug him when we were alone, he would just stand in my arms as I hugged him and when I would let go, I would see him with a pink face and him looking at me after I hugged him.

After all this, he's become very distant, yet acts very strange.
In front of his friends he hangs out with he is extremely quiet and acts like I
don't exist (They used to bully him about me and say that he was in love with me
because he would talk about me and hang out with me sometimes.) But when we are
in class and his other friends (who don't tease him about me) he actually
defends me if they playfully try to touch me, he will literally push them away
and say 'don't touch him'. He used to stare at me ALOT and if I caught him, he
would look away quickly, NOW he just stares and doesn't look away, he just keeps
staring, he stares full on into my eyes, and from a distance!! (and I know he is
staring because he is looking at me and he even followed my eyes when I looked
up at the roof and quickly back at him.) He used to be so loving and nice to me
and now he's completely different but he keeps staring at me and acts defensive
if he friends try to play touch me. What is going on???

I recently saw
him at a social gathering and when i walked in the doors and towards my friends
who were calling out my name, as soon as he saw me, he had the biggest smile on
his face and he nodded his head and smiled to me. Later on, we were standing ina
group and he was standing near me (like he usually does) and I caught him
looking at me and I looked at him and he quickly looked away and looked back,
and than I looked away and looked back because I noticed he looked back at me
and than we both looked away. I went off to see what other people were doing at
the gathering and afew minutes later I noticed he was walking around alone, and
he was a couple meters away form me and I turned around and saw him standing
there looking at me to the side with a face like this :/ but he barely spoke to
me at the gathering which I don't understand... and when i asked him about why
he didn't talk much, he said that he did. (which he didn't) Whenever I ask him
why he stares at me or doesn't tlak, he just awkwardly laughs it off. (or it
seems awkward to me)

These are just some of the things I can remember
that he's done and I don't know if I'm just over analysing, but I really don't
know what his deal is.. Any ideas??