This is a pretty long post, thanks to anyone who reads it! So, 2 weeks ago me, my family and our family friends (mom, dad, son and daughter) went on a holiday together. I've only met this family once before, it was my mom that usually had contact with them. The daughter is the same age as me and she is really, really pretty. I'd say I'm just an average looking guy. Since the first time I've seen her, I knew I hadn't had a chance at dating her. BUT, the second we stepped in to our new apartment, she started heavily flirting with me. She kept staring at me, smiling at me, laughing at my jokes. Almost everytime I looked at her she was staring at me. It was really awkward because her family was always around. Always. I hadn't had a chance to talk with her. So I asked her out for a walk in the evening. That's when we had our first "real" talk. We had a really good conversation. We kept going out for walks almost every following day. We were also working out and running a few miles every morning before everyone else woke up. Our holiday break was coming to an end, and on the last day of it I finally managed to courage up and ask her for here phone number (I'm kind of shy and I've never had a real serious relationship before). She was SO excited when I handed her my phone to type in her number. I texted her a day after, just saying hello and asking her if they managed to safely drive home. No answer. I said to myself - that's okay, if she doesn't answer in a few days, I'll just send her a facebook message (she added me herself a the first day of our holidays). After 2 days, that's exactly what I did. I started up by saying hello. She went offline and answered me a few hours later when I wasn't online. When I got back up, she was already online. I tried to start a conversation with her and she got offline a few minutes after I messaged her. She came back online in the late evening and "Seen-ed" my message. She still hasn't responded to it yet, after a few hours of seeing it. I'm not sure if she's avoiding me, or what? I'm just really confused, she was really into me a few days ago and flirting with me, but now she's treating me like I'm nobody. I've talked about this with my best friend and he encouraged me to just call her, but I don't know what to say and I certanly don't want to come off looking desperate. What should I do? Help! TL;DR: Met a girl, she heavily flirted with me. A few days later when I texted her, she did not reply. She also hasn't answered a facebook message I've sent her. What to do?