Flirting

I need to know if she's into me or just messing around?

Well so there's this girl at work, we've been eyeing each other for a long time. We finally got to talk and later i asked her out got her number but she didn't come because she had to work that day. We started talking a little on WhatsApp then added her on snapchat later. And I've been off work for more than a week so a couple of days ago i received a snap from her with a caption saying "imy already" and before that we had just added each other for a few days but never snapped anything to each other. To which i replied "aww me too" Then the next day i thought of sending her something sweet too So i sent her a selfie with "you've been on my mind lately and i wanted to be direct about it and just say hi" So then she asked "who's that for?😂" And she saved that snap in chat And i replied with a sarcastic joke which she laughed off And she sent a selfie snap later too. The next day she sent a cute selfie snap and later a selfie of her and a boy with a caption "love❤️". I don't know if she's trying to make me jealous or is that a boyfriend. Now I don't know if she's into me or just messing around. I personally feel she's into me because the way she gazes at me at work is really adorable and she gives death stares to other girls i talk to at work. I know i sound crazy but i really don't know what to do since I'm very bad at picking hints lol. Should i flirt back and forth and see where this goes or just forget about her?

I need to know if she's into me or just messing around?
Post Opinion