Guys what should i do? im confused pls help///?

I have a gf for quite some time problem is....she seldom can meet me..while I wanna meet her most of the time...i feel as if that she plays a very important part in my life...im 24 and shez 20....but she doesnt seem 2 understand tat....we barely meet...like once in a month it is really difficult...and as 4 me...i have plans of settling down cos im getting older....bt she still has the playful mentality.....i told her that she should limit her contacts with friends as when u are preparing to settle down...things like this should belooked into...if not where wld the family be heading if ur gonna be always thinking or talking to yr friends...talkin n all is fine but just limit...tis is wat i said....im 24....my friends and guys my age....all have a girlfriend....and therefore theyare unable to meet up and go out together with me...i feel so upset n bored...cos even on the weekends i end up at home and it is really painful...cos i really wanna spend time with my loved one..wat shd i do???