Not sure just off what you said. To me it sounds like you are teetering on the Friend Zone Cliff. If you get another shot I would make strong moves. Lets look at it this way. If its only a 10% chance you f this girl, do you want to take that shot, or go for 100% her friend? A lot of guys can't take rejection so they don't make strong moves, but women want to be TAKEN. They want to be conquered. Also, don't do jack shit over text. Its just my experience, but I have never had a budding relationship turn romantic off texts and shit. Women want everything done the hard way which means strong moves in real life. You may want to download some self help tapes if you aren't sure what to do. One move I do I forget I think its called creating the attraction but basically you find reasons to touch them on their arm or whatever while you are talking to them. Body language is very important. You want to project confidence, masculinity, strength etc. To answer your question calling her is a good move IMO but I would not leave voice mail. Again its just my opinion but I think you are really close to the Friend Zone Cliff so dont f this up.