Search Results: how to act cool

There is this girl I kinda work with. She works in the warehouse I get product from, but we used to work together a year ago. For a while there seemed to be mutual flirting and it was cool until she got a boyfriend, and after a while she became super hot and cold with me.
She'd one day come to me asking me for favors, relationship advice, or ask me something random, then the next day she wouldn't say anything and act like I kicked her dog. Then she'd yell, like actually yell, at me if I didn't say hi to her.
She even went off on me because a customer told me I looked twice my age, and I felt very self conscious and asked her how old I looked and she said age didn't matter, my question didn't matter, and she had a boyfriend anyway... Like ok.
But anyway, I got promoted to my current spot now, and since she goes out of her way to make sure I see her while I'm there. But she is still either rude or super nice. Last week, she was goofing around with someone I was talking to and I tried to take her phone playfully, and she said in a sarcastic (?) Way I was mean. She didn't mean that, but I said that I felt she was usually mean to me if I saw her, and she pouted and walked away.
But a few days ago, she was doing the same thing and I did the same thing, by taking her phone, and this time she went, "are you fucking kidding me" and we all were kind of taken aback. I apologized, gave her phone back and left. I was only being playful and the people around me knew I was kidding.
But what I'm worried about is, we've just been doing our sexual harassment training, and she apparently was in a bad mood from her meeting. Should I be worried about any issues from this? I know I absolutely need to stay away from her. But I just don't want to lose my job for a little horseplay.

My girlfriend is a sophomore. She's thicc asf, 5'3, 150. When I first went up to her, it was to run game, cuz I've been a player. She had on black leggings. So I just tried my best to act cool, ignore it. I couldn't on her cuz she's thicc and wore those, so my eyes dropped to her booty&legs in those and my chin fell open😲😲! Thing was... ugh... my ego did too all right?😤😤so I looked up to try and distract her, but I looked RIGHT INTO her...😑😑😑straight face! I couldn't break through it. Well we've been together almost 2 mos. Well last night I heard her on the phone with her friend. She was telling her that she had heard a phone convo of mine a few days ago. I had told a friend of mine how when my girl wears those and keeps a straight face, it frustrates me because it makes me remember what I tried on her that first day and how easily she won, how it killed my ego. She said to her friend now that she heard that, she's gonna get a few more pairs of black leggings and wear em a lot, while keeping a straight face around me, since she wants a player to feel what it's like to have his ego hit bottom. Ugh!😭😭😭helppp! What should I do now that she's gonna do that? I regret being that way, but it's just frustrating!