Should I give up on this girl that I like?

So I met this girl at the mall, and I instantly got attracted to her. Her mom works at me at my store, So I would always see her around and say hi. One day I asked her for her number and she gave it to me and every since then we've been texting back and forth. She recently broke up with her boyfriend, and she would always text me telling me the update of her relationship. She is also a year and a half older than me! She would text me good morning texts, and send selfies of herself but would take a very long time to reply. She asked me to come to the mall one day, and I went to hang out with her and her sister. It was cool, had a nice convo for like 2 hours with her and got attracted to her because of that. She told me about an obssesed bestfriend that tatted her name on his hand also, and he recently went to chill with her and her sister at a restraint. She texted me saying how she saw him for the first time and how the tattoo is real. On snapchat the next day, I seen they were hanging out... I honestly felt bad because I do like this girl but it seems like I was wrong about her liking me :( She did text me first today saying hey, but I don't know what to do. Should I still try to get at her or no?