<human>: I used to live overseas when I was a teenager and there was a girl I knew in my greater friendship circle. When I was 18 I left but I went back to visit every few years and this girl stayed in my friendship circle even though we were never close and we would never communicate otherwise.

Recently I went back and visited and ended up spending two or three days with her hanging out and Ive developed a thing for her. The problem is while I was there she was super friendly but since Ive come home ive found it incredible difficult to stay in touch with her. I message her on facebook but she so rarely uses it that theres no real point and I don't know whether texting or whatsapping is too.. imposing. Its the first time i've been in a situation where im always over thinking things and im not used to it. It will come across as arrogant but usually its not this difficult for me.

Every day that passes makes me want to talk to her more but i don't want to come across as some obsessive individual. So I don't know what I should do. We've exchanged 3 or 4 messages on facebook since then but thats about it. The last message i sent her hasnt been read according to the facebook message thing but its been two weeks! When I left she said we should stay in contact and keep in touch often but since then its been the opposite.

Am I just over thinking things? Am I just missing a major hint here that she was being friendly and thats it. Halp!

Summarize the given text in a few sentences.
<bot>: Met an old friend while I was overseas. Spent a few days together. Im crushing over here and want to be in her life in one way or another but can't read the situation.