I think she might like me?

So I started talking to this girl yesterday and we got along great. The only time I had talked her before was when she told me I was cute on Instagram/Facebook.

Lately, she has been posting on Facebook about how she's been really stressed lately. So I sent her a long message about how she could talk to me about anything. She said I made her day "a billion times better", and put a "big smile on her face". :) She also seemed interested because she told me I was really cute before I even gave her any advice. She ended up confiding in me about some stuff that had been going on between her and her ex and I gave her advice that she said really helped her a lot. :p

Eventually I asked for her number and she was happy to give it to me! So I texted her this morning and it took her hours to reply. When she replied, she seemed very interested and used hearts and lots of emoticons, so I replied to that text like I always had, with smiley faces and whatnot. But now she hasn't replied and its been over 8 hours, I've also noticed that she"s been on Facebook off and on. Should I wait it out and see if she replies in the morning? or what? Thanks :)