What does it mean when a guy says stop following me?

Hey,

I like this guy .. in my university .. and he's the kind of a guy who focuses on his studies more than love & girls

I added him on facebook to know more about him .. then he started asking me why did I add him? & who am I?! .. or he'll remove me from his friends list, so I told him that I like him..

then he said "I don't wanna mislead you" .. He said being friends is fine, so he kept removing me from his friends list ..

One day, he said he has a girlfriend in a sudden .. I got really hurt & I tried to forget about him .. and I was doing fine .. until once in the end of the first semester he was staring at me & smiling ..

so I sent him a message asking him "Why were you staring at me today?!" He's like "I don't even know you" .. so he kept asking me to show him my pic .. and he'd answer all my questions .. but the thing is .. that I showed him my pic.s and he just stopped answering me ..

Then I travelled .. & came back .. checked my facebook, I found that he removed me from his friends list ..

so the 2nd semester begun .. and he started to stare at me alot!! .. and smile at me .. even when he's talking with his friends he keeps talking to them while he's staring at me ..

Then my birthday came .. so my friend wanted to do me a favor .. so she sent him a msg .. on facebook .. to make him admit that he likes me .. & it's obvious ..

suddenly he's so pissed off .. & started not to look at me .. and not stay at university like before

and I sent him a msg on facebook asking him what's wrong with him?! & that will be my last msg!

but he didn't answer .. so I ignored him too!

these weeks he started staring at me again .. & starts whistling when he sees me .. & blushes! & start showing off when I pass in front of him ... & today he's wearing a suit "though he always wears scrubs" .. he studies Dentistry 5th year .. and I'm 1st year ..

so today .. I was walking in front of him in the hall .. going to my lecture .. so he was ... and he's walking slowly too! .. while he was making sounds as if he's cleaning his throat "as if he's saying hey!! I'm right behind you!! look at me!!"

but I didn't look

He could've passed me ;S!

anyways ..today too! I went to the cafeteria and he's sitting right in front of it! .. so I passed in front of him twice .. & my friend noticed him staring at me ...

But today .. which is the same day.... he sent me a msg on facebook saying "stop following me"!

By the way, there are two girls who try to make me feel jealous by sitting with him and chit chatting with him as "friends" .. One of them is 4th year and the other is 5th year

and I think they both know that I like him .. cuz they started doing this as soon as they knew!

and yeah! .. when my friends says something in front of him like "oh! there he is!" I keep saying "whatever!" "I don't care" .. "Ew!" But I'm not sure if heard it or not!

What does all that mean?! I don't really understand him!.. What's wrong with him?!

and what should I do?!