Do not wait 19 days for some bitch to call you back to talk about something this important. Trust me, I've been burnt here before. She's trying to buy time for you to lose interest or for her to get the guts to end it. Some bitch pulled the same move on me when I went to college last year. I was a fool, bought it for a month, and wasted six weeks of college still thinking I was in a relationship that had obviously already ended. You're better off giving her a week tops and calling her and giving her the opportunity to talk to you. If she says she can't talk, end it. If you're "meant to be", she'll be in touch. You really have to know when to move on. You've been in this relationship for a month and a half; don't waste more time in it if it's not working.
I didn't have the heart to say it this directly, but Jake's right. It's almost certainly over. Better luck next time, and lay off the marriage talk so soon. A girl might be flatterred by it at first, but it inevitably leads to suffocation.
