First of all, I know you shouldn't sh*t where you sleep so don't worry about me.

Recently started a new job in an office full of women, mainly older married/divorced type women and this one younger girl. I've kept myself to myself, spoken when needed to be friendly and when required.

I noticed on the first week of my new job, I caught the younger girl, (we'll name her Sophie) looking at me when I had my head turned so I got a vibe she was somewhat interested. A couple of weeks passed and I'm getting to know 'everyone' better, including Sophie. I maintain strong eye contact with every woman in my office including Sophie and it isn't too intense, just calm and relaxed. Sophie sometimes maintans eye contact for a few seconds while blinking a couple of times before looking away. Sometimes she plays with her hair or fidgets and other times, she doesn't.

We got talking about Instagram and both followed each other. One day me and Sophie got talking about a mutual interest I didn't know we had in common which I thought was cool. That very same day, I messaged her on Instagram genuinely asking a question about our mutual interest and I wasn't being 'thirsty' or desperate, but to her it may have come across desperate but it wasn't my intention. She actually didn't reply to my message and left me on unread (probably deleted the message). I realise this was probably too early because she seems very popular and gets lots of male attention from work, and she has a boyfriend. I took this as 'friendzone' and continued talking to her as friendly as possible and work related without mentioning it to her and feeling butt hurt (I generally wasn't). Fast forward to 2 weeks ago, I put a gym transformation up on my Instagram and she didn't like my post or anything, but I noticed her interest peaking again in work. I caught her 3 times in 1 week looking at me when I had my back turned and when I caught her every time, she looked away straight away and pretended like she wasn't looking. She makes a lot of noise and moans throughout the day but I don't bite and just ignore most things, and only give my attention when I feel like it. Today I put on a tight t-shirt so you could see my muscles through my t-shirt and she striked up 2-3 conversations without me initiating which isn't something she normally does, it would usually be me striking up a conversation from her initial moaning. She didn't doll herself up in makeup today like she usually would do, but she had lots of cleavage on show which is the first time I've seen her like this and when I turned around to have a chat, she would stand up as if she was trying to show me her boobs or something, before walking away somewhere or doing something which involved her standing.

Am I looking at this all wrong and she's purely just looking for attention from me, or are your thoughts telling you she's interested? She's a good looking gym type girl who gets lots of male attention so she knows she looks good and is probably has a high ego. It's worth mentioning again that she has told me she has a boyfriend and I'm also taken too, I have a girlfriend.