<human>: Obviously I don't have much experience in dating etiquette. I (M) met a girl on a group backpacking trip (FoF). We wound up hanging out a lot over the 3 days, talked had a lot of non-sexual close contact and even got drunk one night and almost hooked-up. She walked me back to my tent and I asked her to come in but she said "I shouldn't" and then gave me a long hug and left. After the trip was over and I was about to leave to head home I told her that I was about to leave the country for two weeks but would it be Ok if I gave her a call when I got back. She said yes and seemed genuinely excited by the idea. She smiled and took my hand and squeezed it before we parted ways. So I left and got back about four days ago. The day after I got back I called her and it went straight to voicemail. I left a message identifying myself, said I was back in town and calling to say Hi and left my number saying she could call or text me anytime. I tried to make it sound as casual as possible. Three days have gone by and I haven't heard anything. I just tried calling her again. This time it rang a bunch before it went to voicemail. I hung up without leaving her a message. Should I let this go? Can I wait a few more days and try calling again or is that getting into stalker territory? I don't want to blow this by jumping the gun, calling too much and coming off as creepy, maybe she's just busy or something, but I also don't want to blow this if it's somehow the case that she just didn't get my first message.

Summarize the given text in a few sentences.
<bot>: met a girl who seemed to be into me but can't seem to get her on the phone after two calls, can I call again?