errr...she is showing you pictures of her boyfriend... do you need it spelling out for you? she has a boyfriend!!
"hang out" may have meant just that, hang out - it is not asking someone out. you both sound very young
the fact that you have made all kinds of somewhat unkind judgements of her based on knowing her for 5 half days, and assuming that during the work day you speak to her for only a couple of short periods a day, you don't know her at all really
she has been clear with you