<human>: Give me a shortened version of the text

I (college junior) started dating this freshman girl that I met during the fall in an organization that I am part of. We've gone on three dates, text relatively frequently and have been keeping in touch over the break via facebook messages. So far so good. My problem is this: I'm having trouble initiating physical contact and making the relationship less formal/cordial. I've attempted the good night kiss, casual touching, etc. but normally aborted after she seemed to tense up. In any other situation I would assume that she's not interested, but given her nearly constant efforts to hang out/keep in touch with me and the general level of flirtation I'm pretty sure that's not the case. She had a pretty sheltered high school experience, and I get the sense that I'm the first guy that's shown interest in her. She still seems a little nervous around me and I'm just looking for a way to make our rapport more casual and comfortable. Do you guys have any date ideas or tactics that I could use to rectify this situation when I return for the spring semester?
<bot>: Been briefly dating college freshman. She appears interested but nervous hanging out with me. I need advice on making the relationship more casual/comfortable.