2 unknown sms-es in a night

1st sms came at 9.03 pm
it was in chinese, so i asked my roommate to translate it for me
it says : do you know that (one guy's name), because of you, fell from the bicycle and was admitted to the hospital?

huh?i am so innocent man!

2nd sms came at 12.10 am
this time in english

stranger : hi. i got your number from a friend through the internet.
want to be friends?

(out of curiosity and my pat-ness, i decided to reply)

me : huh?is this a prank or what?

stranger : prank? what mean?

me : who is this? and from who you got my number

stranger : a friend of u

me : my friend doesn't have a name?

stranger : agreement him with me

(wtf??so i assume he meant he had agreed with my so-called friend not to disclose his identity)

stranger : bye.

now...which freaking idiot gave away my number?reveal yourself!!
have the guts to give my number but no courage to admit it..cis!!
i'll cincang you hidup-hidup if i find out who you are.