Guys i need yur answers (ages 12-14)?

okk im 13 and my bf is rlly sweet and nice 2 me bt wen hes around his frends, he acts like he doesnt kno me. doesnt talk 2 me at alllll at school.. i luv him ALOT!! and hes told me he luvs me 2. like a yr ago wen we 1st startd dating, he was totally obsessd with me. i culd just tell. but now im not so sure. i mean he texts me sumtimes but its always like 1 word sentences. guys, have u EVER been obsessd with a girl at that age, so much so that u would during recess leave ur friends so u could sit on the curb and wait 4 ur gf 2 find u and sit by u. i swear he used 2 do that. but now he barely talks 2 me. im scared 2 lose him. cuz i luv him alot. btw plz dont tell me im 2 young.. or im stupid.. i just need 2 kno wut its like 2 b a guy and if u love the girl, is she all u ever think about or.. not lol.