should i attempt to call her again?

so, there was this girl who was in two of my classes last semester who i kind of had a crush on. our relationship, if you even call it a relationship, invovled casual converstions on her way to the dorms and in class. it was kind of a hit and miss with her when talking to her. i mean, if i picked a particular subject, she could just go on an on, the talking i mean. but if i don't, then there is like this slience. there are occations when i walked with her after classes to her dorms because on the days that i couldn't come up with anything to say except for our classes, i just let it go and watch her walk away. plus, she mostly listen to her iphone and i didn't really want to bother her on the times she listen to her. and in classes, it was kinda weird because she would sometimes sit next to me and sometimes she sat away, but at least we were sitting in the same row and in the other class, i sat right behind her. there was so much mystery around her, and i think that's what made me interested in her. that and she said she drives a motorcycle and can get free airfair miles because her dad works with planes (haha). she's um, not one of the most prettest person i ever liked, but the mysterious nature and risktaking down to earth (can that even be put together?) makes me like her so much.

i just get so gosh darn nervous around her even though she seems like an easy person to talk to from the times we had together. and, i dont know i just this vibe from her, i really dont know how to explain it.

so anyways, one time i tried asking if she wanted to hang out. she thought i meant to study. i was too nervous to say anything else and said yah, even though that wasn't what i meant. then another time, i got a text from her because she wasnt in class one day. so that's how i got her number. then, on one of the last classes before finals, i finally had enough guts to asked her if she wanted to hang out. she said yah, but said that i can call her anytime. the problem with that is that i dont like to be the one calling because i always feel awkward with phone conversation, even if i am calling my friends. and i dont really like to be the one that plans sort of stuff for hanging out. i kinda want to go with the flow. also, she said she would be kinda of busy during the winter break. in like two days, she would be done with winter session classes, because in my school, there was an option of some classes to be taken during winter break at school and she's take a 2 week crash course of this one class. so she'll be done, but then spring classes start a week after. 

i've attempted to call her serveral times. i called her about 4 times in the last month (4-5 weeks). 1st time i called, we talk for a minute but she had to finish some project for this one class. i should said more but didnt because i was scared and i didnt really want to bother her. i said sorry that i called but she was real nice about it and said see you later type of thing. next time i called, nothing. and the next 2 calls i left voicemail, but hasnt called back. and that was 2 weeks ago. 

should i call again? i kinda dont want to if all i'll get to do is to leave a voicemail. i dont even know if she's gay or whatever. i havent even had the chance to really talk to her. i dont have any experience with women or relationship and the women i did like all pretty much were straight. i don't really define myself a lesbian or straight. i just happen to like girls a little more than guys, wait should i even be saying that, i know that there are people out there that don't agree to what i just said right there. anyways, again with the subejct title, should i attempt to call her again?

Update: i tried texting her and had no answer whatsoever. uggh...this is so hopeless! why do this things keep happening to me! hahaha...oh well, thanks for the comments though.

i never realized that people would be really willing to give me some advise in this situation because i don't really have a bunch of friends that i can really talk to and i don't have any bisexual or lesbian friends to really talk to about this kinds of things.