I love a guy hu love sum1 else..nd he too noe dat i luv him.. i feel hez ignorin me dese day..wat shud i do ?

well i m a 15 yrs old..n a guy to hum i love a lot is of 16yrs...v are frenz from last 15 months and m in luv wid him 4m last 11 months...he is my best fren nd wat do he says is d same..d day whn i ws gonna tll him dat i ws in luv wid him he told me he ws in love wid sum1 else...as i cnt hide nythin 4m him nd i don wan to hide nythin so 1 day i told him dat i ws in luv wid him..d gal to hum he loves a lot doesnt care much abt her bt yah she too loves him bt evrytym she hurts him..n whn he gt hurt m depress..i go hurt..bt 4m last week wat m feeling is hez goin damn depress he is ignoring me..infact hez ignorin evry1..n m afraid dat oder ppl don leave him..i still love him..my bro says i shud 4gt him bt i cn help..i noe itz nt an attraction..i rlly love him a lot..i nly smile , i nly laugh whn he is happy n dis is d reason my frenz says m changing a lot.. how shud i stop him n shud stop myself 4m being change ?m afraid dat he don change himself..n he don leave me? wat shud i do? pls help