I think my bf loves me?

i love my bf alot, and i know he loves me too. But i dont know why he did this: On msn, he stopped saying how he loves me nd all that on his pm, and i still say how i love him on my pm, instead of him sometimes saying ' i love you' to me, im always the one who sais 'i love you' first, but he usualy sais 'i love you 2.' Also, the night before i went over to my best freinds house 4 a sleep ova, he asked her if i really love him. And i love him alot, and he should know that, cuz like only a couple weeks b4, i had bort him a present for no particular reason but bcuz i love him. i think he thaught i dont love him anymore bcuz we dont rlly talk @ skool, and he made em promice that she wouldnt tell me he asked her that, but ofcourse she told me cuz shes my best friend. but i am realy hurt that he doubted that i love him. Also, the night b4 i went over 2 em's house 4 da sleep ova, he stayed up till 1:00am txting her, bt then wen i was ova, he only stayed up till like 12:00am txting me. And wen he decided 2 go 2 bed @ 12:00, he said 'im tiard, going 2 bed now, goodnite' 2 both em and i, and he didnt say i love you or anything 2 me, and after i said goodnite and i love you 2 him, he didnt reply at all, not saying ' i love you 2' or anything! Also, he can be quite physial with the other 3 girls in my cl, even tho they r just his friends. i told that 2 one of them, and she hadnt noticed, cuz unlike me, she doesnt stare at him all day, and moniter his every move, but wen i told her, and she started 2 pay attention, she told me she realised what i meant. He isn't cheating on me or anything, i know that, and im 12, hes 13, and he is my first bf, and im his seccond gf. (Also, we knew eachother from kindy to yr 3, than i went 2 a nother skool, and came bac dis yr (yr 8)- so we kinda known eachother 4 a while, but not very well.) He wouldnt be cheating on me, cuz our skool is tiny, with like only 150-200 students, of both primary and high school. i love him alot, but y is he doing this 2 me?