How do i knw it is true love?

well i meet 1 gal online 5 months bck,nw frm last 1 mnth we r very close..daily excahnge of personal sms -20-30sms,we also call..livng in diff cities!we bth care n support eachother a lot.i feel restless if i dnt rec her sms fr more thn 3hrs or so...now half of me says i luv her n other half opp of it....she luves me........i m nt able to decide........i thk i luv her bec she luvs me n supports me.....or i really luv her........she has becme part of my life.....n i cant spend a day without talkg or smsing her...............is it true luv?