This guy is confusing me? long question with all the details be prepared to read. (:?

so the thing is im new at my school like Ive been here for a couple months but im still considered new haha.....so the guys are going to flirt it's a givin right? so anyways this guy in my cl always gives me hugs and stuff then i went to a basketball game and we talked about mostly just random crap most the time and hung out just us two the entire time and he was really cool and all and was flirting and all that good nonsense . so i told him i didn't have a phone and he said it worried him and that he would give me his old one lol and then he gave me this rose he made in welding and was really happy i liked it he always sits by me in cl or makes excuses to sit by me most the time . so he has this background on his phone that says i love you and hes joking around and shows it to me and looks all serious and is like i love you haha..so there is this girl he dated but they broke up and im friends with her and all and he is still like madly obsessed with her and she doesn't like him..and whenever shes not around like in gym the other day he called me beautiful....and he did it before that too i just pretended like i didn't hear him. anyways so today things were going as usual and he was flirting blah blah blah but then people i guess were saying he liked me and he said no and got all pissy and started ignoring me all together (and stop's sitting by me in every cl and toattley avoiding contact with me at all cost) and told his two best guy friends that are also my two best guy friends to do the same? WTF? is he telling them to ignore me because they flirt with me and it makes him jealous or something? is he embarred to maybe like me? whats wrong with me? it kinda makes me feel like **** ya know.