<human>: Over summer break I visited a family friend (hadn't seen for 10 years) for what was supposed to be a week. Due to unforeseen circumstances I had to stay for another 6 weeks. During that time I spent pretty much every day and evening going out with their daughter 22 (IAM 20, male)

After 6 weeks spending most of my time with her we both flirted a fair amount but nothing actually happened just the odd touching and lying together on the sofa with a blanket and an awkwardly long (over the acceptable 3 seconds) and intense hug when I was finally leaving.

So I get back home and back to college and we're talking nearly every day for 4 months (Sep-Dec) on Skype or Gtalk. She's planning on coming to visit on January I cancel my plans with friends as I'm obviously looking forward to seeing her again. 

Come January she's not coming as she's busy (fair enough) college is pretty hectic. What's odd is the sudden lack of interest and communication. I call her Mum every week or so (both our mums are childhood friends) to say hello and usually she would then grab the phone off her mum to talk to me. Though since January I've not heard from her once. Her mum always say's oh she's in class (even though I've not asked about her)

Now I know I sound like a completely obsessed, forever alone guy but I genuinely thought this was actually going somewhere. It seemed so at the time.

Also I have had a few gf's so it's not a case of first time female attention blown out of proportion.

What I was hoping for was anyone to maybe shed some light on why someone would just start ignoring another person for no apparent reason. Also what should I don't want to seem all high school and email asking her what's up why aren't you talking to me anymore.

Can you condense the text into three sentences or less?
<bot>: Spent 6 weeks with a girl, went back home (she) called everyday for 4 months. Suddenly she completely ignores me.