Lend money or not?

A friend sms me this afternoon .
" I would like to ask a favor, do you lend $300 since my friend need it"
Excuse me, is your friend my friend even though I have never ever
seen your friend ??
Don`t you think this is super crazy and funny favor to ask me?
$300 is not big money ,I am talking abt what he asked me.


Actually I was disappointed with this friend because in Japan ,if a friend ask to lend money from friend,it implies that either He /She doesnt care if our relationship is going to spoil" OR if he/she is really really suffer his/her life . So that ,I thought that he doesnt think our relationship is important.
For me ,to ask to lend money is risky ,also don`t want to do it .If I need money ,I ask my family first.

Well, this is not first time that my friend asked for money.
Since I came to Singapore, some guys friends asked me and I lent money 2 times to my ex-bf and ex-ex bf.
They promised me that he would pay me back, but never paid me back.
BF is a special for me ,so that if he needs money,
I may help him...but basically I don`t want to borrow and lend money.


I talked to K since I was comfused again..
He gave me advise that not to lend money unless he is my good friend.
He told me his experience and guided me...so I finally replied back to my
friend that I hardly help his friend.
Because actually I also dont have enough money now since I need make payment rent of housing,internet, mobile phone, medication, and ticket to Japan ( terribly expensive!)
I also want to ask to lend money...hahaha
I also have headache on daily expense.
After replied back to him ,but then,,again this friend still begged me to lend money...headache. How?
Do you think I am cold person???