Please bare in mind that wanting to have a friend, is not like
"hey, please be my friend leh!" that kinda thing.
If you do not spare an effort in making friends, no one will ever
gonna get close to you. If i'm not mistaken, you might fall under
the category of "relationship oriented" guy. Which means you place
your gf above all else. Well, its not something bad, but it will
means your friends wun be in your priority list.
Note that acquaintance are totally different from a friend.
acquaintance are there only when you met up and both of you will
give response like "hi, bye" while friends listen to you, stand by
you and advice on when you have troubles.
No one in this world likes to be ignore or being make use of. Spare
more time in thinking what you can do to, like squeeze out time
from your gf and communicate more with your friends. Either by
going out, chat in msn or even an sms. Every little things makes a
difference.